lt3graph (14apr14)

git-svn-id: svn://tug.org/texlive/trunk@33439 c570f23f-e606-0410-a88d-b1316a301751

6 files changed, 158 insertions, 151 deletions

diff --git a/Master/texmf-dist/doc/latex/lt3graph/README b/Master/texmf-dist/doc/latex/lt3graph/README
index dc000a3790d..52a25fcaca5 100644
--- a/Master/texmf-dist/doc/latex/lt3graph/README
+++ b/Master/texmf-dist/doc/latex/lt3graph/README
@@ -1,9 +1,9 @@
 latex-lt3graph
 =============
 
-LaTeX Package : lt3graph 0.0.9-r1
+LaTeX Package : lt3graph 0.1.0
 
-Last Modified : 2013-12-07
+Last Modified : 2014-04-13
 
 Author        : Michiel Helvensteijn  (www.mhelvens.net)
 
diff --git a/Master/texmf-dist/doc/latex/lt3graph/lt3graph.pdf b/Master/texmf-dist/doc/latex/lt3graph/lt3graph.pdf
index bde2ad5c201..5d3f5922909 100644
--- a/Master/texmf-dist/doc/latex/lt3graph/lt3graph.pdf
+++ b/Master/texmf-dist/doc/latex/lt3graph/lt3graph.pdf
diff --git a/Master/texmf-dist/doc/latex/lt3graph/lt3graph.tex b/Master/texmf-dist/doc/latex/lt3graph/lt3graph.tex
index 27c982f0d9c..f3e637870c9 100644
--- a/Master/texmf-dist/doc/latex/lt3graph/lt3graph.tex
+++ b/Master/texmf-dist/doc/latex/lt3graph/lt3graph.tex
@@ -1,6 +1,6 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \iffalse %%%%
 %                                                                              %
-%  Copyright (c) 2013 - Michiel Helvensteijn   (www.mhelvens.net)              %
+%  Copyright (c) 2013 - Michiel Helvensteijn - www.mhelvens.net                %
 %                                                                              %
 %  https://github.com/mhelvens/latex-lt3graph                                  %
 %                                                                              %
@@ -21,8 +21,9 @@
 
 \documentclass[a4paper]{lt3graph-packagedoc}
 
-\usepackage {amssymb}
-\usepackage {tikz}
+\usepackage       {amssymb}
+\usepackage       {tikz}
+
 \usetikzlibrary {matrix}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -80,6 +81,12 @@
 \changes{0.0.9}{2013/12/07}
   {creation of the documentation}
 
+\changes{0.1.0}{2014/04/13}
+  {fixed a bug in\\
+   \texttt{\textbackslash graph_(g)put_vertex} and\\
+   \texttt{\textbackslash graph_(g)put_edge},
+   which caused their global versions not to work properly}
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{document}                                                               %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -92,9 +99,9 @@ This package provides a data-structure for use in the \LaTeX3 programming
 environment. It allows you to represent a \emph{directed graph}, which
 contains \emph{vertices} (nodes), and \emph{edges} (arrows) to
 connect them.\footnote
-	{ Mathematically speaking, a directed graph is a tuple \( (V, E) \)
-	  with a set of vertices \( V \) and a set of edges \( E \subseteq V \times V \)
-      connecting those vertices.}
+	{ Mathematically speaking, a directed graph is a tuple
+	  \( (V, E) \) with a set of vertices \( V \) and a set of edges
+	  \( E \subseteq V \times V \) connecting those vertices. }
 One such a graph is defined below:
 
 \begin{latex-example}
@@ -239,7 +246,7 @@ The first generates the transitive closure of a graph:
 \begin{latex-example-show}
 \ExplSyntaxOn \centering
     \graph_display_table:N \l_my_graph
-    \( \ \rightsquigarrow\ \)
+    \(\ \ \rightsquigarrow\ \ \)
     \graph_display_table:Nn \l_closed_graph
         { row_keys = false, vertex_vals = false }
 \ExplSyntaxOff
@@ -265,7 +272,7 @@ The second transformation function generates the transitive reduction:
 \begin{latex-example-show}
 \ExplSyntaxOn \centering
     \graph_display_table:N \l_my_graph
-    \( \ \rightsquigarrow\ \)
+    \(\ \ \rightsquigarrow\ \ \)
     \graph_display_table:Nn \l_reduced_graph
         { row_keys = false, vertex_vals = false }
 \ExplSyntaxOff
diff --git a/Master/texmf-dist/tex/latex/lt3graph/lt3graph-dry.sty b/Master/texmf-dist/tex/latex/lt3graph/lt3graph-dry.sty
index d9b6cce119e..bcb21ea2e3d 100644
--- a/Master/texmf-dist/tex/latex/lt3graph/lt3graph-dry.sty
+++ b/Master/texmf-dist/tex/latex/lt3graph/lt3graph-dry.sty
@@ -1,6 +1,6 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \iffalse %%%%
 %                                                                              %
-%  Copyright (c) 2013 - Michiel Helvensteijn   (www.mhelvens.net)              %
+%  Copyright (c) 2013 - Michiel Helvensteijn - www.mhelvens.net                %
 %                                                                              %
 %  https://github.com/mhelvens/latex-lt3graph                                  %
 %                                                                              %
diff --git a/Master/texmf-dist/tex/latex/lt3graph/lt3graph-packagedoc.cls b/Master/texmf-dist/tex/latex/lt3graph/lt3graph-packagedoc.cls
index e792191b829..62b0ceeacdb 100644
--- a/Master/texmf-dist/tex/latex/lt3graph/lt3graph-packagedoc.cls
+++ b/Master/texmf-dist/tex/latex/lt3graph/lt3graph-packagedoc.cls
@@ -1,6 +1,6 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                                              %
-%  Copyright (C) 2013 by Michiel Helvensteijn - www.mhelvens.net               %
+%  Copyright (c) 2013 - Michiel Helvensteijn - www.mhelvens.net                %
 %                                                                              %
 %  https://github.com/mhelvens/latex-lt3graph                                  %
 %                                                                              %
@@ -29,15 +29,14 @@
 % Importing The Main Package                                                   %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-%\RequirePackage{\packagename}
-
-\RequirePackage[display]{\packagename}
+\RequirePackage{\packagename}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Importing Other Packages                                                     %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 \RequirePackage{etoolbox}
+\RequirePackage[table]{xcolor}
 \RequirePackage[xcolor]{mdframed}
 \RequirePackage{marginnote}
 \RequirePackage{listings}
diff --git a/Master/texmf-dist/tex/latex/lt3graph/lt3graph.sty b/Master/texmf-dist/tex/latex/lt3graph/lt3graph.sty
index 4c9b4fb6055..9306e0061bb 100644
--- a/Master/texmf-dist/tex/latex/lt3graph/lt3graph.sty
+++ b/Master/texmf-dist/tex/latex/lt3graph/lt3graph.sty
@@ -1,6 +1,6 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \iffalse %%%%
 %                                                                              %
-%  Copyright (c) 2013 - Michiel Helvensteijn   (www.mhelvens.net)              %
+%  Copyright (c) 2013 - Michiel Helvensteijn - www.mhelvens.net                %
 %                                                                              %
 %  https://github.com/mhelvens/latex-lt3graph                                  %
 %                                                                              %
@@ -19,7 +19,7 @@
 %                                                                              %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \fi %%%%
 
-% \CheckSum{841}
+% \CheckSum{845}
 %
 % \CharacterTable
 %  {Upper-case    \A\B\C\D\E\F\G\H\I\J\K\L\M\N\O\P\Q\R\S\T\U\V\W\X\Y\Z
@@ -48,7 +48,7 @@
 %    \begin{macrocode}
 \NeedsTeXFormat{LaTeX2e}
 \RequirePackage{expl3}
-\ProvidesExplPackage{lt3graph}{2013/12/05}{0.0.9-r1}
+\ProvidesExplPackage{lt3graph}{2013/12/05}{0.0.9-r2}
   {a LaTeX3 datastructure for representing directed graphs with data}
 %    \end{macrocode}
 %
@@ -81,38 +81,6 @@
 
 
 
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-%  We now test whether the |display| option was used:
-%
-%    \begin{macrocode}
-\bool_new:N       \__graph_format_bool
-\bool_set_false:N \__graph_format_bool
-
-\keys_define:nn {lt3graph}
-  { display .code:n = \bool_set_true:N \__graph_format_bool }
-
-\ProcessKeysPackageOptions {lt3graph}
-%    \end{macrocode}
-%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%
-%  If the |display| option was used, load additional packages:
-%
-%    \begin{macrocode}
-\bool_if:NT \__graph_format_bool {
-  \RequirePackage[table]{xcolor}
-}
-%    \end{macrocode}
-%
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-
-
-
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % \subsection{Additions to \LaTeX3 Fundamentals}                               %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -195,8 +163,8 @@
   { \seq_map_inline:Nn \g__graph_prop_data_types_seq {#1} }
 \seq_new:N               \g__graph_prop_data_types_seq
 \seq_set_from_clist:Nn   \g__graph_prop_data_types_seq
-  {vertices, edge-values, edge-froms, edge-tos, edge-triples,
-   indegree, outdegree}
+  {vertices, edge-values, edge-froms, edge-tos,
+   edge-triples, indegree, outdegree}
 %    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -230,6 +198,13 @@
     \tl_set:cn    {##1} {#2}
   }
 }
+\cs_new_protected:Nn \__graph_ptr_gnew:Nn {
+  \withargs [\uniquecsname] {
+    \tl_gset:Nn #1 {##1}
+    \tl_new:c     {##1}
+    \tl_gset:cn    {##1} {#2}
+  }
+}
 %    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -368,7 +343,7 @@
   {
     %%% create pointer to value
     %
-    \__graph_ptr_new:Nn \l__graph_vertex_data_tl {#3}
+    \use:c {__graph_ptr_#4new:Nn} \l__graph_vertex_data_tl {#3}
 
     %%% add the vertex
     %
@@ -378,8 +353,8 @@
     \graph_get_vertex:NnNT #1 {#2} \l_tmpa_tl {
       %%% initialize degree to 0
       %
-      \use:c{prop_#4put:cnn} {\__graph_tl:nnn{graph}{#1}{indegree}}  {#2}{0}
-      \use:c{prop_#4put:cnn} {\__graph_tl:nnn{graph}{#1}{outdegree}} {#2}{0}
+      \use:c{prop_#4put:cnn} {\__graph_tl:nnn{graph}{#1}{indegree}}  {#2} {0}
+      \use:c{prop_#4put:cnn} {\__graph_tl:nnn{graph}{#1}{outdegree}} {#2} {0}
     }
   }
 \tl_new:N \l__graph_vertex_data_tl
@@ -433,7 +408,7 @@
             { \__graph_tl:nnn{graph}{#1}{edge-tos}     }
             { \__graph_key:nn{#2}{#3}                  }
             { \tl_to_str:n{#3}                         }
-          \__graph_ptr_new:Nn \l__graph_edge_data_tl {#4}
+          \use:c{__graph_ptr_#5new:Nn} \l__graph_edge_data_tl {#4}
           \use:c{prop_#5put:coV}
             { \__graph_tl:nnn{graph}{#1}{edge-values}  }
             { \__graph_key:nn{#2}{#3}                  }
@@ -591,8 +566,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 %  Test whether a vertex |#2| exists. If so, its value is
-%  stored in |#3| and |T| is left in the input stream. If it
-%  doesn't, |F| is left in the input stream.
+%  stored in |#3| and |T| is left in the input stream. If
+%  it doesn't, |F| is left in the input stream.
 %
 %    \begin{macrocode}
 \prg_new_protected_conditional:Nnn \graph_get_vertex:NnN
@@ -688,9 +663,9 @@
 \cs_new:Npn \graph_if_vertex_can_reach_cycle:NnTF #1#2
   { \__graph_if_vertex_can_reach_cycle:NnnTF #1 {#2} {\__graph_empty_set} }
 \cs_new:Npn \graph_if_vertex_can_reach_cycle:NnT #1#2
-  { \__graph_if_vertex_can_reach_cycle:NnnT #1 {#2} {\__graph_empty_set} }
+  { \__graph_if_vertex_can_reach_cycle:NnnT  #1 {#2} {\__graph_empty_set} }
 \cs_new:Npn \graph_if_vertex_can_reach_cycle:NnF #1#2
-  { \__graph_if_vertex_can_reach_cycle:NnnF #1 {#2} {\__graph_empty_set} }
+  { \__graph_if_vertex_can_reach_cycle:NnnF  #1 {#2} {\__graph_empty_set} }
 
 \prg_new_conditional:Nnn \__graph_if_vertex_can_reach_cycle:Nnn
   {p, T, F, TF}
@@ -754,6 +729,41 @@
 
 
 
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %  Test whether graph |#1| contains any cycles:
+% %
+% %    \begin{macrocode}
+% \prg_new_protected_conditional:Nnn \graph_get_cycle:NN
+%   {T, F, TF}
+%   % #1: graph id
+%   % #2: l3seq variable to put the cycle description in
+%   {
+%     \seq_clear:N #2
+%     \__graph_get_cycle:NNTF #1 #2
+%       {\prg_return_true: }
+%       {\prg_return_false:}
+%   }
+% 
+% \prg_new_protected_conditional:Nnn \__graph_get_cycle:NN
+%   {T, F, TF}
+%   % #1: graph id
+%   % #2: l3seq variable
+%   {
+%     \graph_map_successors_inline:Nnn #1 {} {
+%       \seq_if_in:NnTF #2 {##1} {
+%         % TODO
+%       }{
+%         % TODO
+%       }
+%     }
+%   }
+% %    \end{macrocode}
+% %
+% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 %  Assume that graph |#1| is acyclic and test
@@ -1302,22 +1312,25 @@
 %
 %    \begin{macrocode}
 \cs_new_protected:Nn \graph_map_topological_order_tokens:Nn {
+  
   %%% Fill \l__graph_source_vertices with source-nodes and count indegrees
   %
   \prop_clear:N \l__graph_source_vertices
   \graph_map_vertices_inline:Nn #1 {
-    \prop_put:Nnf \l__graph_tmp_indegrees_int {##1}
-      {\graph_get_indegree:Nn #1 {##1}}
-    \int_compare:nT {\graph_get_indegree:Nn #1 {##1} = 0}
-      { \prop_put:Nnn \l__graph_source_vertices {##1} {} }
-  }
+    \prop_put:Nnf \l__graph_tmp_indeg_int {##1}
+        { \graph_get_indegree:Nn #1 {##1} }
+    \int_compare:nT {\graph_get_indegree:Nn #1 {##1} = 0} {
+      \prop_put:Nnn \l__graph_source_vertices {##1} {} 
+  } }
   
   %%% Main loop
   %
   \bool_until_do:nn {\prop_if_empty_p:N \l__graph_source_vertices} {
     %%% Choose any vertex (\l__graph_topo_key_tl, \l__graph_topo_value_tl)
     %
-    \__graph_prop_any_key_pop:NN \l__graph_source_vertices \l__graph_topo_key_tl
+    \__graph_prop_any_key_pop:NN
+        \l__graph_source_vertices
+        \l__graph_topo_key_tl
     \graph_get_vertex:NVNT #1 \l__graph_topo_key_tl \l__graph_topo_val_tl {
       %%% Run the mapping funtion on the key and value from that vertex
       %
@@ -1328,29 +1341,25 @@
       %%% and add all now-empty vertices to \l__graph_source_vertices
       %
       \graph_map_outgoing_edges_inline:NVn #1 \l__graph_topo_key_tl {
-        \prop_put:Nnf \l__graph_tmp_indegrees_int {##2}
-          {\int_eval:n {\prop_get:Nn \l__graph_tmp_indegrees_int {##2} - 1}}
-        \int_compare:nT {\prop_get:Nn \l__graph_tmp_indegrees_int {##2} = 0} {
+        \prop_put:Nnf \l__graph_tmp_indeg_int {##2}
+          {\int_eval:n {\prop_get:Nn \l__graph_tmp_indeg_int {##2} - 1}}
+        \int_compare:nT {\prop_get:Nn \l__graph_tmp_indeg_int {##2} = 0} {
           \prop_put:Nnn \l__graph_source_vertices {##2} {}
-        }
-      }
-    }
-  }
-}
+} } } } }
 \cs_new_protected:Nn \__graph_prop_any_key_pop:NN {
   \prop_map_inline:Nn #1 {
     \tl_set:Nn #2 {##1}
     \prop_remove:Nn #1 {##1}
-    \prop_map_break:n {\use_none:n}
+    \prop_map_break:n {\use_none:nnn}
   }
-  { \tl_set:Nn #2 {\q_no_value} }
+  \tl_set:Nn #2 {\q_no_value} % TODO: test
 }
 \cs_generate_variant:Nn \withargs:nnn                        {VVn}
 \cs_generate_variant:Nn \graph_map_outgoing_edges_inline:Nnn {NVn}
 \cs_generate_variant:Nn \prop_put:Nnn                        {Nnf}
 \cs_generate_variant:Nn \graph_get_vertex:NnNT               {NVNT}
 \prop_new:N \l__graph_source_vertices
-\prop_new:N \l__graph_tmp_indegrees_int
+\prop_new:N \l__graph_tmp_indeg_int
 \tl_new:N \l__graph_topo_key_tl
 \tl_new:N \l__graph_topo_val_tl
 %    \end{macrocode}
@@ -1367,8 +1376,9 @@
 %  Assumes that the graph is acyclic (for now).
 %
 %    \begin{macrocode}
-\cs_new:Nn \graph_map_topological_order_function:NN
-  { \graph_map_topological_order_tokens:Nn #1 {#2} }
+\cs_new:Nn \graph_map_topological_order_function:NN {
+  \graph_map_topological_order_tokens:Nn #1 {#2}
+}
 %    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -1387,8 +1397,7 @@
   \withargs (c) [\uniquecsname] [#2] {
     \cs_set:Npn ##1 ####1####2 {##2}
     \graph_map_topological_order_function:NN #1 ##1
-  }
-}
+} }
 %    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -1406,49 +1415,49 @@
 %  Set graph |#1| to the transitive closure of graph |#2|.
 %
 %    \begin{macrocode}
-\cs_new_protected:Nn \graph_set_transitive_closure:NN
-  { \__graph_set_transitive_closure:NNNnn #1 #2 \use_none:nnn {} { } }
-\cs_new_protected:Nn \graph_gset_transitive_closure:NN
-  { \__graph_set_transitive_closure:NNNnn #1 #2 \use_none:nnn {} {g} }
-\cs_new_protected:Nn \graph_set_transitive_closure:NNNn
-  { \__graph_set_transitive_closure:NNNnn #1 #2 #3 {#4} { } }
-\cs_new_protected:Nn \graph_gset_transitive_closure:NNNn
-  { \__graph_set_transitive_closure:NNNnn #1 #2 #3 {#4} {g} }
-\cs_new_protected:Nn \__graph_set_transitive_closure:NNNnn
+\cs_new_protected:Nn \graph_set_transitive_closure:NN {
+  \__graph_set_transitive_closure:NNNnn #1 #2 \use_none:nnn {} { }
+}
+\cs_new_protected:Nn \graph_gset_transitive_closure:NN {
+  \__graph_set_transitive_closure:NNNnn #1 #2 \use_none:nnn {} {g}
+}
+\cs_new_protected:Nn \graph_set_transitive_closure:NNNn {
+  \__graph_set_transitive_closure:NNNnn #1 #2 #3 {#4} { }
+}
+\cs_new_protected:Nn \graph_gset_transitive_closure:NNNn {
+  \__graph_set_transitive_closure:NNNnn #1 #2 #3 {#4} {g}
+}
+\cs_new_protected:Nn \__graph_set_transitive_closure:NNNnn {
   % #1: target
   % #2: source
   % #3: combination function with argspec :nnn
   % #4: default 'old' value
-  {
-    \use:c{graph_#5set_eq:NN} #1 #2
-    
-    \cs_set:Nn \__graph_edge_combinator:nnn
-      { \exp_not:n { #3 {##1} {##2} {##3} } }
-    \cs_generate_variant:Nn \__graph_edge_combinator:nnn {VVV}
-    
+  \use:c{graph_#5set_eq:NN} #1 #2
+  
+  \cs_set:Nn \__graph_edge_combinator:nnn {
+    \exp_not:n { #3 {##1} {##2} {##3} } }
+  \cs_generate_variant:Nn \__graph_edge_combinator:nnn {VVV}
+  
+  \graph_map_vertices_inline:Nn #2 {
     \graph_map_vertices_inline:Nn #2 {
-      \graph_map_vertices_inline:Nn #2 {
-        \graph_get_edge:NnnNT #2 {##1} {####1} \l__graph_edge_value_i_tl {
-          \graph_map_vertices_inline:Nn #2 {
-            \graph_get_edge:NnnNT #2 {####1} {########1}
-                \l__graph_edge_value_ii_tl {
-              \graph_get_edge:NnnNF #1 {##1} {########1}
-                  \l__graph_edge_value_old_tl
-                { \tl_set:Nn \l__graph_edge_value_old_tl {#4} }
-              \exp_args:NNx \tl_set:No \l__graph_edge_value_new_tl {
-                \__graph_edge_combinator:VVV
-                  \l__graph_edge_value_i_tl
-                  \l__graph_edge_value_ii_tl
-                  \l__graph_edge_value_old_tl
-              }
-              \use:c{graph_#5put_edge:NnnV} #1 {##1} {########1}
-                  \l__graph_edge_value_new_tl
+      \graph_get_edge:NnnNT #2 {##1} {####1}
+          \l__graph_edge_value_i_tl {
+        \graph_map_vertices_inline:Nn #2 {
+          \graph_get_edge:NnnNT #2 {####1} {########1}
+              \l__graph_edge_value_ii_tl {
+            \graph_get_edge:NnnNF #1 {##1} {########1}
+                \l__graph_edge_value_old_tl {
+              \tl_set:Nn \l__graph_edge_value_old_tl {#4}
             }
-          }
-        }
-      }
-    }
-  }
+            \exp_args:NNx \tl_set:No \l__graph_edge_value_new_tl {
+              \__graph_edge_combinator:VVV
+                \l__graph_edge_value_i_tl
+                \l__graph_edge_value_ii_tl
+                \l__graph_edge_value_old_tl
+            }
+            \use:c{graph_#5put_edge:NnnV} #1 {##1} {########1}
+                \l__graph_edge_value_new_tl
+} } } } } }
 \cs_generate_variant:Nn \graph_put_edge:Nnnn  {NnnV}
 \cs_generate_variant:Nn \graph_gput_edge:Nnnn {NnnV}
 \cs_generate_variant:Nn \tl_to_str:n          {o}
@@ -1464,30 +1473,26 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
-%  Assume that graph |#2| contains no cycles, and set graph |#1| to its transitive reduction.
+%  Assume that graph |#2| contains no cycles, and
+%  set graph |#1| to its transitive reduction.
 %
 %    \begin{macrocode}
-\cs_new_protected:Nn \graph_set_transitive_reduction:NN
-  { \__graph_set_transitive_reduction:NNn #1 #2 { } }
-\cs_new_protected:Nn \graph_gset_transitive_reduction:NN
-  { \__graph_set_transitive_reduction:NNn #1 #2 {g} }
-\cs_new_protected:Nn \__graph_set_transitive_reduction:NNn
+\cs_new_protected:Nn \graph_set_transitive_reduction:NN {
+  \__graph_set_transitive_reduction:NNn #1 #2 { } }
+\cs_new_protected:Nn \graph_gset_transitive_reduction:NN {
+  \__graph_set_transitive_reduction:NNn #1 #2 {g} }
+\cs_new_protected:Nn \__graph_set_transitive_reduction:NNn {
   % #1: target
   % #2: source
-  {
-    \use:c{graph_#3set_eq:NN} #1 #2
+  \use:c{graph_#3set_eq:NN} #1 #2
+  \graph_map_vertices_inline:Nn #2 {
     \graph_map_vertices_inline:Nn #2 {
-      \graph_map_vertices_inline:Nn #2 {
-        \graph_get_edge:NnnNT #2 {##1} {####1} \l_tmpa_tl {
-          \graph_map_vertices_inline:Nn #2 {
-            \graph_get_edge:NnnNT #2 {####1} {########1} \l_tmpa_tl {
-              \use:c{graph_#3remove_edge:Nnn} #1 {##1} {########1}
-            }
-          }
-        }
-      }
-    }
-  }
+      \graph_get_edge:NnnNT #2 {##1} {####1} \l_tmpa_tl {
+        \graph_map_vertices_inline:Nn #2 {
+          \graph_get_edge:NnnNT #2 {####1} {########1} \l_tmpa_tl {
+            \use:c{graph_#3remove_edge:Nnn} #1 {##1} {########1}
+  } } } } }
+}
 %    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -1502,23 +1507,21 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
-%  If the |display| option was given, we define some additional
+%  We define some additional
 %  functions that can display the graph in table-form.
-%
-%    \begin{macrocode}
-\bool_if:NT \__graph_format_bool {
-%    \end{macrocode}
-%
 %  This is the option-less version, which delegates
-%  to the full version of the function:
+%  to the full version:
 %
 %    \begin{macrocode}
-\cs_new_protected:Nn \graph_display_table:N
-  { \graph_display_table:Nn #1 {} }
+\cs_new_protected:Nn \graph_display_table:N {
+  \graph_display_table:Nn #1 {} }
 %    \end{macrocode}
 %
 %  The full version has a second argument accepting options
-%  that determine table formatting. We first define those options:
+%  that determine table formatting. We first define those options.
+%  Please note that with the standard options, the |xcolor| package
+%  is required with the |table| option, because of our use of the
+%  |\cellcolor| command.
 %
 %    \begin{macrocode}
 \keys_define:nn {lt3graph-display} {
@@ -1667,7 +1670,8 @@
 %  We are finished with this row; go on to the next iteration:
 %
 %    \begin{macrocode}
-    \tl_put_right:Nx \l__graph_table_content_tl { \seq_use:Nn \l__graph_row_seq {&} }
+    \tl_put_right:Nx \l__graph_table_content_tl
+        { \seq_use:Nn \l__graph_row_seq {&} }
     \tl_put_right:Nn \l__graph_table_content_tl {\\\hline}
 %    \end{macrocode}
 %    \uninteresting\begin{macrocode}
@@ -1697,9 +1701,6 @@
 \bool_new:N \l__graph_table_skipfirst_bool
 \seq_new:N \l__graph_row_seq
 %    \end{macrocode}
-%    \uninteresting\begin{macrocode}
-}
-%    \end{macrocode}
 %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%