exsheets (9feb17)

git-svn-id: svn://tug.org/texlive/trunk@43188 c570f23f-e606-0410-a88d-b1316a301751

10 files changed, 194 insertions, 91 deletions

diff --git a/Master/texmf-dist/doc/latex/exsheets/README b/Master/texmf-dist/doc/latex/exsheets/README
index 39d0ecbec78..d6ca6030caf 100644
--- a/Master/texmf-dist/doc/latex/exsheets/README
+++ b/Master/texmf-dist/doc/latex/exsheets/README
@@ -1,5 +1,5 @@
 --------------------------------------------------------------------------
-EXSHEETS 2016/09/07 v0.21e
+EXSHEETS 2017/02/08 v0.21i
 bundled packages:
 the EXSHEETS package
   Yet another package for the creation of exercise sheets
@@ -8,10 +8,10 @@ the EXSHEETS-LISTINGS package
 
 --------------------------------------------------------------------------
 Clemens Niederberger
-Web:    http://www.mychemistry.eu/forums/forum/exsheets/
+Web:    https://bitbucket.org/cgnieder/exsheets/
 E-Mail: contact@mychemistry.eu
 --------------------------------------------------------------------------
-Copyright 2011-2016 Clemens Niederberger
+Copyright 2011-2017 Clemens Niederberger
 
 This work may be distributed and/or modified under the
 conditions of the LaTeX Project Public License, either version 1.3
diff --git a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
index 6fc39115038..56e3247c0d2 100644
--- a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
+++ b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.pdf
diff --git a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
index 2f52f587d72..d79c5de0630 100644
--- a/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
+++ b/Master/texmf-dist/doc/latex/exsheets/exsheets_en.tex
@@ -1,8 +1,8 @@
+% !arara: pdflatex
+% !arara: biber
 % arara: pdflatex
-% arara: biber
 % arara: pdflatex
 % arara: pdflatex
-% !arara: pdflatex
 % --------------------------------------------------------------------------
 % the EXSHEETS package
 % 
@@ -13,7 +13,7 @@
 % Web:    http://www.mychemistry.eu/forums/forum/exsheets/
 % E-Mail: contact@mychemistry.eu
 % --------------------------------------------------------------------------
-% Copyright 2011-2016 Clemens Niederberger
+% Copyright 2011-2017 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
@@ -283,7 +283,7 @@ in section~\ref{sec:additional_info}.
 Then there is --~at least in Germany~-- the habit of having lists of exercises
 aligned in columns but counting from the left to the right instead from up to
 down.  That's why the \pkg{tasks} package was developed as part of \ExSheets{}
-and was ditrsibuted as part of the bundle\changedversion{0.15}.  Now it is a
+and was distributed as part of the bundle\changedversion{0.15}.  Now it is a
 package of its own but is loaded by \ExSheets{} automatically with the
 necessary setup to make them work together nicely.
 
@@ -543,7 +543,7 @@ The third type aren't options at all, actually.  However, thanks to the great
 the objects used by \ExSheets.  This is explained in a little more detail in
 part~\ref{part:style} on page~\pageref{part:style}\,ff.  This third type,
 however, brings in a possible instability: the \pkg{xtemplate} package is in
-an experimental and developping state.  This means that the sytax of the
+an experimental and developing state.  This means that the sytax of the
 package may and possibly will change sometime in the future.  I cannot foresee
 what any consequences of that will be for \ExSheets.
 
@@ -625,7 +625,7 @@ Questions are written inside the \env{question} environment:
 \begin{environments}
   \environment{question}[\oarg{options}\marg{points}]
     The main environment: creates a new exercise/question.  Both arguments are
-    optionial!
+    optional!
 \end{environments}
 \begin{example}
   \begin{question}
@@ -1306,8 +1306,8 @@ Ideally one could assign more than one topic to a question but this is
 \ExplSyntaxOff
 
 \subsection{Own Dividing Concepts}
-\noindent\sinceversion{0.8}Actually both classes and topics are introduced
-into \ExSheets\ internally this way:
+Actually\sinceversion{0.8} both classes and topics are introduced into
+\ExSheets\ internally this way:
 \begin{sourcecode}
   \DeclareQuestionClass{class}{classes}
   \DeclareQuestionClass{topic}{topics}
@@ -1772,9 +1772,8 @@ following options:
     The command should take one mandatory argument.
 \end{options}
 
-
 \section{Own Question/Solution Pairs}
-\noindent\changedversion{0.9}\ExSheets\ provides the possibility to create new
+\ExSheets\changedversion{0.9} provides the possibility to create new
 environments that behave like the \env{question} and \env{solution}
 environments.  This would allow, for example, to define a
 \env*{question*}/\env*{solution*} environment pair for bonus questions.  The
@@ -1816,9 +1815,9 @@ standard \env{question} and \env{solution} environments.
 
 \section{Filling in the Blanks}
 \subsection{Cloze}
-\noindent\changedversion{0.4}Both in exercise sheets and in exams it is
-sometimes desirable to be able to create \blank{blanks} that have to be filled
-in.  Or maybe some more lines: \blank[width=5\linewidth]{}
+Both\changedversion{0.4} in exercise sheets and in exams it is sometimes
+desirable to be able to create \blank{blanks} that have to be filled in.  Or
+maybe some more lines: \blank[width=5\linewidth]{}
 
 \begin{commands}
   \command{blank}[\sarg\oarg{options}\marg{text to be filled in}]
@@ -1844,6 +1843,14 @@ The options are these:
   \keyval{linespread}{num}\Module{blank}\Default{1}
     Set the linespread for the blank lines.  This only has an effect if
     \cs{blank} is used at the begin of a paragraph.
+  \keyval{line-increment}{dim}\Module{blank}\Default{1pt}
+    \sinceversion{0.21h}When the blank line ist built it is built in multiples
+    of this value.  If the value is too large you may end up with uneven
+    lines.  If the value is too small you may end up with a non-ending
+    compilation.
+  \keyval{line-minimum-length}{dim}\Module{blank}\Default{2em}
+    \sinceversion{0.21h}The minimal length a line must have before it is built
+    step by step.
 \end{options}
 \begin{example}
   \begin{question}
@@ -1863,12 +1870,12 @@ A number of empty lines are easily created by setting the width option:
 \end{example}
 
 \subsection{Vertical Space for answers}
-\noindent\sinceversion{0.3}When you're creating an exam you might want to add
-some vertical space where the students can write down their answers.  While
-you can always use \cs*{vspace} this is not always handy when the space left
-on the page is less than you want.  In this case it would be nice if a) there
-would be no warning and b) the rest of the space would be added at the top of
-the next page.  This is what the following command is for:
+When\sinceversion{0.3} you're creating an exam you might want to add some
+vertical space where the students can write down their answers.  While you can
+always use \cs*{vspace} this is not always handy when the space left on the
+page is less than you want.  In this case it would be nice if a) there would
+be no warning and b) the rest of the space would be added at the top of the
+next page.  This is what the following command is for:
 \begin{commands}
   \command{examspace}[\sarg\marg{dim}]
     Add space as specified in \meta{dim}. If the space available on the
diff --git a/Master/texmf-dist/doc/latex/exsheets/grading-table.pdf b/Master/texmf-dist/doc/latex/exsheets/grading-table.pdf
index 5854584c383..a845bcabb0b 100644
--- a/Master/texmf-dist/doc/latex/exsheets/grading-table.pdf
+++ b/Master/texmf-dist/doc/latex/exsheets/grading-table.pdf
diff --git a/Master/texmf-dist/doc/latex/exsheets/grading-table.tex b/Master/texmf-dist/doc/latex/exsheets/grading-table.tex
index e1b4f2d0b95..ef109bd164e 100644
--- a/Master/texmf-dist/doc/latex/exsheets/grading-table.tex
+++ b/Master/texmf-dist/doc/latex/exsheets/grading-table.tex
@@ -1,3 +1,30 @@
+% ----------------------------------------------------------------------------
+% the EXSHEETS package
+% 
+%   Yet another package for the creation of exercise sheets
+% 
+% ----------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    http://www.mychemistry.eu/forums/forum/exsheets
+% E-Mail: contact@mychemistry.eu
+% ----------------------------------------------------------------------------
+% Copyright 2011-2017 Clemens Niederberger
+% 
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+%   http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+% 
+% This work has the LPPL maintenance status `maintained'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% ----------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% ----------------------------------------------------------------------------
 \documentclass{scrartcl}
 \usepackage{exsheets}
 
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets-listings.sty b/Master/texmf-dist/tex/latex/exsheets/exsheets-listings.sty
index 35766b9129a..8e77c4aff43 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets-listings.sty
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets-listings.sty
@@ -8,7 +8,7 @@
 % Web:    https://bitbucket.org/cgnieder/exsheets/
 % E-Mail: contact@mychemistry.eu
 % ----------------------------------------------------------------------------
-% Copyright 2011-2016 Clemens Niederberger
+% Copyright 2011-2017 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
@@ -93,7 +93,7 @@
         \keys_set:nn {exsheets/listings/question} {#1,#4,##1}
         \int_gincr:N \g__exsheets_listings_question_int
         \lst@BeginWriteFile
-          { \c_job_name_tl - ex \int_use:N \g__exsheets_listings_question_int . lst }
+          { \c_sys_jobname_str - ex \int_use:N \g__exsheets_listings_question_int . lst }
       }
       {
         \lst@EndWriteFile
@@ -105,7 +105,7 @@
             \exp_not:V \l__exsheets_listings_question_pre_tl
             \exp_not:N \lstinputlisting
               [ \exp_not:V \l__exsheets_listings_question_code_tl ]
-              { \c_job_name_tl - ex \int_use:N \g__exsheets_listings_question_int . lst }
+              { \c_sys_jobname_str - ex \int_use:N \g__exsheets_listings_question_int . lst }
             \exp_not:V \l__exsheets_listings_question_post_tl
           }
         \end {#3}
@@ -115,7 +115,7 @@
         \keys_set:nn { exsheets / listings / solution } { #1,#7,##1 }
         \int_gincr:N \g__exsheets_listings_solution_int
         \lst@BeginWriteFile
-          { \c_job_name_tl - sol \int_use:N \g__exsheets_listings_solution_int . lst }
+          { \c_sys_jobname_str - sol \int_use:N \g__exsheets_listings_solution_int . lst }
       }
       {
         \lst@EndWriteFile
@@ -126,7 +126,7 @@
             \exp_not:V \l__exsheets_listings_solution_pre_tl
             \exp_not:N \lstinputlisting
               [ \exp_not:V \l__exsheets_listings_solution_code_tl ]
-              { \c_job_name_tl - sol \int_use:N \g__exsheets_listings_solution_int . lst }
+              { \c_sys_jobname_str - sol \int_use:N \g__exsheets_listings_solution_int . lst }
             \exp_not:V \l__exsheets_listings_solution_post_tl
           }
         \end {#6}
@@ -141,5 +141,7 @@
 \tex_endinput:D
 
 HISTORY
-2013/09/18 v0.1 - first draft, see http://tex.stackexchange.com/a/133969/5049
-2013/10/11 v0.2 - first official version bundled with ExSheets
+2013/09/18 - first draft, see http://tex.stackexchange.com/a/133969/5049
+2013/10/11 - first official version bundled with ExSheets
+2017/02/08 - change deprecated \c_job_name_tl into the new \c_sys_jobname_str
+
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets.sty b/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
index 09df4ddcab7..73136dadac1 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets.sty
@@ -8,7 +8,7 @@
 % Web:    http://www.mychemistry.eu/forums/forum/exsheets
 % E-Mail: contact@mychemistry.eu
 % ----------------------------------------------------------------------------
-% Copyright 2011-2016 Clemens Niederberger
+% Copyright 2011-2017 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
@@ -28,8 +28,8 @@
 \RequirePackage { expl3 , xparse }
 \ExplSyntaxOn
 
-\tl_const:Nn \c_exsheets_date_tl    {2016/09/07}
-\tl_const:Nn \c_exsheets_version_tl {0.21e}
+\tl_const:Nn \c_exsheets_date_tl    {2017/02/08}
+\tl_const:Nn \c_exsheets_version_tl {0.21i}
 \tl_const:Nn \c_exsheets_info_tl
   {Yet~ another~ package~ for~ the~ creation~ of~ exercise~ sheets~ and~ exams.}
 
@@ -167,7 +167,7 @@
 
 % ----------------------------------------------------------------------------
 \RequirePackage
-  { xtemplate , l3sort , l3keys2e , etoolbox , environ , pgfcore }
+  { xtemplate , l3keys2e , etoolbox , environ , pgfcore }
 
 % ----------------------------------------------------------------------------
 % write to aux file:
@@ -271,10 +271,10 @@
 \tl_set:Nn \l__exsheets_heading_instance_tl {block}
 \tl_new:N  \l__exsheets_question_heading_instance_tl
 \tl_new:N  \l__exsheets_solution_heading_instance_tl
-\tl_new:N  \l_exsheets_heading_title_user_format_tl
-\tl_set:Nn \l_exsheets_heading_title_user_format_tl { \normalsize\bfseries }
-\tl_new:N  \l_exsheets_heading_subtitle_user_format_tl
-\tl_set:Nn \l_exsheets_heading_subtitle_user_format_tl { \normalsize\itshape }
+\tl_new:N  \l_exsheets_heading_title_question_format_tl
+\tl_new:N  \l_exsheets_heading_title_solution_format_tl
+\tl_new:N  \l_exsheets_heading_subtitle_question_format_tl
+\tl_new:N  \l_exsheets_heading_subtitle_solution_format_tl
 \tl_new:N  \l__exsheets_questions_toclevel_tl
 \tl_set:Nn \l__exsheets_questions_toclevel_tl {subsection}
 \tl_new:N  \l__exsheets_solutions_toclevel_tl
@@ -345,6 +345,8 @@
 \dim_new:N  \l__exsheets_solutions_skip_below_dim
 \dim_set:Nn \l__exsheets_solutions_skip_below_dim { .5\baselineskip }
 \dim_new:N  \l__exsheets_blank_dim
+\dim_new:N  \l__exsheets_blank_line_increment_dim
+\dim_new:N  \l__exsheets_blank_line_minimum_length_dim
 
 \seq_new:N \l__exsheets_use_tags_seq
 \seq_new:N \g_exsheets_included_questions_seq
@@ -398,10 +400,26 @@
     headings                  .tl_set:N   = \l__exsheets_heading_instance_tl ,
     load-headings             .code:n     =
       \exsheets_option_dropped:n {load-headings} ,
-    headings-format           .tl_set:N   =
-      \l_exsheets_heading_title_user_format_tl ,
-    subtitle-format           .tl_set:N   =
-      \l_exsheets_heading_subtitle_user_format_tl ,
+    question/headings-format  .tl_set:N   =
+      \l_exsheets_heading_title_question_format_tl ,
+    solution/headings-format  .tl_set:N   =
+      \l_exsheets_heading_title_solution_format_tl ,
+    headings-format           .meta:n     =
+      {
+        question/headings-format = {#1} ,
+        solution/headings-format = {#1}
+      } ,
+    headings-format           .initial:n  = \normalsize\bfseries ,
+    question/subtitle-format  .tl_set:N   =
+      \l_exsheets_heading_subtitle_question_format_tl ,
+    solution/subtitle-format  .tl_set:N   =
+      \l_exsheets_heading_subtitle_solution_format_tl ,
+    subtitle-format           .meta:n     =
+      {
+        question/subtitle-format = {#1} ,
+        solution/subtitle-format = {#1}
+      } ,
+    subtitle-format           .initial:n  = \normalsize\itshape ,
     load-tasks                .code:n     =
       \exsheets_option_dropped:n {load-tasks} ,
     use-ref                   .bool_set:N = \l__exsheets_solutions_by_ref_bool ,
@@ -1543,38 +1561,34 @@
   }
 \cs_generate_variant:Nn \__exsheets_restore_number_from_and_do:Nnn { NV }
 
-\NewDocumentCommand \QuestionNumber {m}
+\DeclareExpandableDocumentCommand \QuestionNumber {m}
   { \exsheets_question_number:n {#1} }
 
-\cs_new_protected:Npn \exsheets_question_number:n #1
-  {
-    \prop_get:NnNTF \g__exsheets_questions_id_prop {#1} \l__exsheets_tmpa_tl
-      { \__exsheets_question_number:c { exsheets@question@\l__exsheets_tmpa_tl } }
-      { \textbf {??} }
-  }
+\cs_new:Npn \exsheets_question_number:n #1
+  { \exsheets_get_question_property:nn {counter} {#1} }
  
-\cs_new_protected:Npn \__exsheets_question_number:N #1
-  {
-    \cs_if_exist:NTF #1
-      {
-        \exp_after:wN \__exsheets_get_question_number:w #1 \q_stop
-        \ReadCounterPatternFrom [exsheets] \l__exsheets_qu_counter_pattern_tl
-      }
-      { \textbf {??} }
-  }
-\cs_generate_variant:Nn \__exsheets_question_number:N { c }
-
-\cs_new_protected:Npn \__exsheets_get_question_number:w #1-#2-#3 \q_stop
-  {
-    \cs_if_exist:NT \thechapter
-      { \int_set:Nn \l__exsheets_counter_ch_int {#1} }
-    \int_set:Nn \l__exsheets_counter_sec_int {#2}
-    \int_set:Nn \l_exsheets_counter_qu_int {#3}
-  }
+% \cs_new_protected:Npn \__exsheets_question_number:N #1
+%   {
+%     \cs_if_exist:NTF #1
+%       {
+%         \exp_after:wN \__exsheets_get_question_number:w #1 \q_stop
+%         \ReadCounterPatternFrom [exsheets] \l__exsheets_qu_counter_pattern_tl
+%       }
+%       { \textbf {??} }
+%   }
+% \cs_generate_variant:Nn \__exsheets_question_number:N { c }
+
+% \cs_new_protected:Npn \__exsheets_get_question_number:w #1-#2-#3 \q_stop
+%   {
+%     \cs_if_exist:NT \thechapter
+%       { \int_set:Nn \l__exsheets_counter_ch_int {#1} }
+%     \int_set:Nn \l__exsheets_counter_sec_int {#2}
+%     \int_set:Nn \l_exsheets_counter_qu_int {#3}
+%   }
 
 % map ID's to number of used questions
 \cs_new_protected:Npn \exsheets@used@id #1#2
-  { \prop_gput:Nnn \g__exsheets_questions_used_prop {#2} {#1} }
+  { \prop_gput:Nnn \g__exsheets_questions_used_prop {#1} {#2} }
 
 \cs_new_protected:Npn \__exsheets_mark_as_used:n #1
   {
@@ -1672,6 +1686,8 @@
   }
 \cs_generate_variant:Nn \exsheets_set_question_properties:n { x }
 
+% #1: property
+% #2: ID
 \prg_new_conditional:Npnn \exsheets_if_question_property:nn #1#2 {T,F,TF}
   {
     \prop_if_in:cnTF { g__exsheets_question_property_#1_prop } {#2}
@@ -1726,13 +1742,16 @@
   }
 \cs_generate_variant:Nn \exsheets_get_question_property:nn { no , nV }
 
-\cs_new_protected:Npn \ForEachQuestion #1
+\cs_new_protected:Npn \exsheets_for_each_question_do:n #1
   {
     \int_gzero:N \g__exsheets_tmpa_int
     \prop_map_inline:Nn \g__exsheets_questions_used_prop
       { \int_gincr:N \g__exsheets_tmpa_int #1 }
   }
 
+\NewDocumentCommand \ForEachQuestion {m}
+  { \exsheets_for_each_question_do:n {#1} }
+
 \cs_new:Npn \iflastquestion
   {
     \int_compare:nTF
@@ -2294,6 +2313,7 @@
   {
     \group_begin:
       \bool_set_true:N \l__exsheets_solutions_print_bool
+      \bool_set_true:N \l__exsheets_inside_solution_bool
       \cs_set:Npn \S ##1 { \exref { exse:##1 } }
       \cs_set:Npn \C ##1 { \exref { exch:##1 } }
       \keys_set:nn { exsheets / exsheets_print_solutions } {#1}
@@ -2518,8 +2538,8 @@
         \seq_sort:Nn \l__exsheets_tmpa_seq
           {
             \int_compare:nNnTF {##1} > {##2}
-              { \sort_reversed: }
-              { \sort_ordered: }
+              { \sort_return_swapped: }
+              { \sort_return_same: }
           }
       }
     \seq_map_inline:Nn \l__exsheets_tmpa_seq
@@ -2573,8 +2593,7 @@
   {
     \group_begin:
       \tl_set:Nn \CurrentQuestionID {#1}
-      \tl_set:Nx \l__exsheets_tmpa_tl
-        { \exsheets_get_question_property:nn {counter} {#1} }
+      \tl_set:Nx \l__exsheets_tmpa_tl { \exsheets_question_number:n {#1} }
       \__exsheets_surround_with:nVV
         {
           \exp_args:Nnx
@@ -2695,7 +2714,13 @@
       } ,
     linespread     .code:n =
       \bool_set_true:N \l__exsheets_blank_linespread_bool
-      \tl_set:Nn \l__exsheets_blank_linespread_tl {#1}
+      \tl_set:Nn \l__exsheets_blank_linespread_tl {#1} ,
+    line-increment .dim_set:N =
+      \l__exsheets_blank_line_increment_dim ,
+    line-increment .initial:n = 1pt ,
+    line-minimum-length .dim_set:N =
+      \l__exsheets_blank_line_minimum_length_dim ,
+    line-minimum-length .initial:n = 2em
   }
 
 \NewDocumentCommand \blank { som }
@@ -2734,7 +2759,7 @@
           }
       }
   }
-
+  
 \cs_new_protected:Npn \__exsheets_blank_skip:N #1
   {
     \bool_if:NTF \l__exsheets_blank_width_bool
@@ -2744,22 +2769,24 @@
           { \dim_to_fp:n {#1} * \l__exsheets_blank_scale_tl }
         \dim_set:Nn \l__exsheets_tmpa_dim { \fp_to_dim:N \l__exsheets_tmpa_fp }
       }
-    \dim_compare:nTF { \l__exsheets_tmpa_dim > 2em }
+    \dim_compare:nTF
+      { \l__exsheets_tmpa_dim > \l__exsheets_blank_line_minimum_length_dim }
       {
         \mode_if_math:TF
           { \exsheets_write_blank:n { \skip_horizontal:N \l__exsheets_tmpa_dim } }
           {
-            \exsheets_write_blank:n { \skip_horizontal:n { 1em } }
-            \dim_sub:Nn \l__exsheets_tmpa_dim { 2em }
             \dim_do_while:nn { \l__exsheets_tmpa_dim > \c_zero_dim }
               {
                 \tex_penalty:D \hyphenpenalty
-                \dim_compare:nTF { \l__exsheets_tmpa_dim < 1pt }
+                \dim_compare:nTF
+                  { \l__exsheets_tmpa_dim < \l__exsheets_blank_line_increment_dim }
                   { \exsheets_write_blank:n { \skip_horizontal:N \l__exsheets_tmpa_dim } }
-                  { \exsheets_write_blank:n { \skip_horizontal:n { 1pt } } }
-                \dim_sub:Nn \l__exsheets_tmpa_dim { 1pt }
+                  {
+                    \exsheets_write_blank:n
+                      { \skip_horizontal:N \l__exsheets_blank_line_increment_dim }
+                  }
+                \dim_sub:Nn \l__exsheets_tmpa_dim { \l__exsheets_blank_line_increment_dim }
               }
-            \exsheets_write_blank:n { \skip_horizontal:n { 1em } }
           }
       }
       { \exsheets_write_blank:n { \skip_horizontal:N \l__exsheets_tmpa_dim } }
@@ -3190,6 +3217,13 @@ HISTORY:
 2016/09/07 v0.21e      - fix issue #29
                        - fix issue #35
                        - fix issue #36
+2016/09/17 v0.21f      - make \exsheets_question_number:n an alias of
+                         \exsheets_get_question_property:nn {counter}; this
+                         also makes \QuestionNumber an alias of
+                         \GetQuestionProperty {counter}
+2016/10/25 v0.21g      - smaller steps when creating the blank lines
+2016/11/28 v0.21h      - bug in \exsheets@used@id fixed
+2017/02/08 v0.21i      - adapt to l3sort integration into l3kernel
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % TODO:
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets_configurations.cfg b/Master/texmf-dist/tex/latex/exsheets/exsheets_configurations.cfg
index 3c64153c7ca..e5f7eb0046c 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets_configurations.cfg
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets_configurations.cfg
@@ -1,5 +1,32 @@
+% ----------------------------------------------------------------------------
+% the EXSHEETS package
+% 
+%   Yet another package for the creation of exercise sheets
+% 
+% ----------------------------------------------------------------------------
+% Clemens Niederberger
+% Web:    http://www.mychemistry.eu/forums/forum/exsheets
+% E-Mail: contact@mychemistry.eu
+% ----------------------------------------------------------------------------
+% Copyright 2011-2017 Clemens Niederberger
+% 
+% This work may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+%   http://www.latex-project.org/lppl.txt
+% and version 1.3 or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+% 
+% This work has the LPPL maintenance status `maintained'.
+% 
+% The Current Maintainer of this work is Clemens Niederberger.
+% ----------------------------------------------------------------------------
+% If you have any ideas, questions, suggestions or bugs to report, please
+% feel free to contact me.
+% ----------------------------------------------------------------------------
 \ProvidesFile{exsheets_configurations.cfg}
 
 % Put your definitions and configurations here.
 
-\endinput
\ No newline at end of file
+\endinput
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
index 3f899b23033..3badcdbbf44 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.cfg
@@ -8,7 +8,7 @@
 % Web:    https://bitbucket.org/cgnieder/exsheets/
 % E-Mail: contact@mychemistry.eu
 % --------------------------------------------------------------------------
-% Copyright 2011-2016 Clemens Niederberger
+% Copyright 2011-2017 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
diff --git a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.def b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.def
index b4a436a9520..e7100ce4d63 100644
--- a/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.def
+++ b/Master/texmf-dist/tex/latex/exsheets/exsheets_headings.def
@@ -8,7 +8,7 @@
 % Web:    https://bitbucket.org/cgnieder/exsheets/
 % E-Mail: contact@mychemistry.eu
 % --------------------------------------------------------------------------
-% Copyright 2011-2016 Clemens Niederberger
+% Copyright 2011-2017 Clemens Niederberger
 % 
 % This work may be distributed and/or modified under the
 % conditions of the LaTeX Project Public License, either version 1.3
@@ -167,6 +167,14 @@
 \exsheets_new_heading_coffin:n {points}
 \exsheets_new_heading_coffin:n {subtitle}
 
+\cs_new_protected:Npn \exsheets_heading_format:nn #1#2
+  {
+    \bool_if:NT \l__exsheets_inside_question_bool
+      { \tl_use:c {l_exsheets_heading_#1_question_format_tl} {#2} }
+    \bool_if:NT \l__exsheets_inside_solution_bool
+      { \tl_use:c {l_exsheets_heading_#1_solution_format_tl} {#2} }
+  }
+
 % the `exsheets-heading' object:
 %   #1 = title,
 %   #2 = number,
@@ -266,7 +274,7 @@
         \tl_use:N \l__exsheets_heading_title_format_tl
         \strut
         \tl_use:N \l__exsheets_heading_title_pre_code_tl
-          { \tl_use:N \l_exsheets_heading_title_user_format_tl {#1} }
+          { \exsheets_heading_format:nn {title} {#1} }
         \tl_use:N \l__exsheets_heading_title_post_code_tl
       }
     \hcoffin_set:Nn \l__exsheets_heading_number_coffin
@@ -276,22 +284,20 @@
           { \tl_use:N \l__exsheets_heading_number_format_tl }
         \strut
         \tl_use:N \l__exsheets_heading_number_pre_code_tl
-          { \tl_use:N \l_exsheets_heading_title_user_format_tl {#2} }
+          { \exsheets_heading_format:nn {title} {#2} }
         \tl_use:N \l__exsheets_heading_number_post_code_tl
       }
     \hcoffin_set:Nn \l__exsheets_heading_subtitle_coffin
       {
         \exsheets_if_question_subtitle:T
           {
-            \tl_if_blank:VTF \l__exsheets_heading_subtitle_format_tl
-              { \tl_use:N \l__exsheets_heading_title_format_tl }
-              { \tl_use:N \l__exsheets_heading_subtitle_format_tl }
             \strut
             \tl_use:N \l__exsheets_heading_subtitle_pre_code_tl
             {
               \group_begin:
-                \tl_use:N \l_exsheets_heading_subtitle_user_format_tl
-                { \exsheets_get_question_property:nn {subtitle} {#5} }
+                \exsheets_heading_format:nn
+                  {subtitle}
+                  { \exsheets_get_question_property:nn {subtitle} {#5} }
               \group_end:
             }
             \tl_use:N \l__exsheets_heading_subtitle_post_code_tl