nicematrix (8jun20)

git-svn-id: svn://tug.org/texlive/trunk@55484 c570f23f-e606-0410-a88d-b1316a301751

5 files changed, 64 insertions, 122 deletions

diff --git a/Master/texmf-dist/doc/latex/nicematrix/README.md b/Master/texmf-dist/doc/latex/nicematrix/README.md
index f3183a5cfc4..d55ad613522 100644
--- a/Master/texmf-dist/doc/latex/nicematrix/README.md
+++ b/Master/texmf-dist/doc/latex/nicematrix/README.md
@@ -10,9 +10,7 @@ The LaTeX extension `nicematrix` is distributed under the LPPL 1.3 license.
 ## Presentation
 
 The LaTeX package `nicematrix` provides new environments similar to the classical environments
-`{array}` and `{matrix}` but with some additional features. Among these features are the
-possibilities to fix the width of the columns, to draw continuous ellipsis dots between the cells
-of the array and to add exterior rows and columns (so called *border matrices*).
+`{tabular}`, `{array}` and `{matrix}` but with some additional features. The extension `nicematrix` creates PGF/Tikz nodes corresponding to the cells of the array and uses them to provide new functionalities. 
 
 
 ## Installation
diff --git a/Master/texmf-dist/doc/latex/nicematrix/nicematrix-french.pdf b/Master/texmf-dist/doc/latex/nicematrix/nicematrix-french.pdf
index 6acb7b9f282..c5d481ad72f 100644
--- a/Master/texmf-dist/doc/latex/nicematrix/nicematrix-french.pdf
+++ b/Master/texmf-dist/doc/latex/nicematrix/nicematrix-french.pdf
diff --git a/Master/texmf-dist/doc/latex/nicematrix/nicematrix.pdf b/Master/texmf-dist/doc/latex/nicematrix/nicematrix.pdf
index 0004ec61cd3..184e8e4a595 100644
--- a/Master/texmf-dist/doc/latex/nicematrix/nicematrix.pdf
+++ b/Master/texmf-dist/doc/latex/nicematrix/nicematrix.pdf
diff --git a/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx b/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
index 7e220667699..e957be5dc92 100644
--- a/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
+++ b/Master/texmf-dist/source/latex/nicematrix/nicematrix.dtx
@@ -15,8 +15,8 @@
 %
 % \fi
 % \iffalse
-\def\myfileversion{4.1}
-\def\myfiledate{2020/05/27}
+\def\myfileversion{4.2}
+\def\myfiledate{2020/06/07}
 %
 %
 %<*batchfile>
@@ -825,7 +825,7 @@ version 2005/12/01 or later.
 % h & i & j \\ \hline
 % \end{NiceTabular}
 % \end{BVerbatim}
-% \begin{NiceTabular}{|C|C|C|}[hvlines, code-before =
+% \begin{NiceTabular}{|C|C|C|}[code-before =
 % \cellcolor{red!15}{3-1,2-2,1-3}]
 % \hline
 % a & b & c \\ \hline
@@ -851,7 +851,7 @@ version 2005/12/01 or later.
 % h & i & j \\ \hline
 % \end{NiceTabular}
 % \end{BVerbatim}
-% \begin{NiceTabular}{|C|C|C|}[hvlines, code-before =
+% \begin{NiceTabular}{|C|C|C|}[code-before =
 % \rectanglecolor{blue!15}{2-2}{3-3}]
 % \hline
 % a & b & c \\ \hline
@@ -2346,7 +2346,7 @@ version 2005/12/01 or later.
 %
 % \bigskip
 % \begin{minipage}[c]{7.6cm}
-% Here is a array composed with the following code:
+% Here is an array composed with the following code:
 %
 % \medskip
 % \begin{BVerbatim}
@@ -3424,23 +3424,6 @@ version 2005/12/01 or later.
 %    \end{macrocode}
 % 
 %
-% \medskip
-% The version of 2020/02/08 of \pkg{expl3} has replaced |\l_keys_key_tl| by
-% |\l_keys_key_str|. We have immediately changed in this file. Now, you test the
-% existence of |\l_keys_key_str| in order to detect whether the version of LaTeX
-% used by the final user is up to date.
-%    \begin{macrocode}
-\msg_new:nnn { nicematrix } { expl3~too~old }
-  {
-    Your~version~of~LaTeX~(especially~expl3)~is~too~old.~
-    You~can~go~on~but~you~will~probably~have~other~errors~
-    if~you~use~the~functionalities~of~nicematrix.
-  }
-\cs_if_exist:NF \l_keys_key_str 
-  { \msg_error:nn { nicematrix } { expl3~too~old } } 
-%    \end{macrocode}
-%
-%
 % \bigskip
 % The command for the treatment of the options of |\usepackage| is at the end of
 % this package for technical reasons. 
@@ -3571,8 +3554,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
     \cs_set_protected:Npn \pgfutil@check@rerun ##1 ##2
       {
-        \str_set:Nx \l_tmpa_str { \tl_range:nnn { ##1 } 1 3 }
-        \str_if_eq:VnF \l_tmpa_str { nm- } 
+        \str_if_eq:eeF { nm- } { \tl_range:nnn { ##1 } 1 3 }
           { \@@_old_pgfutil@check@rerun { ##1 } { ##2 } }
       }    
   }
@@ -3646,9 +3628,9 @@ version 2005/12/01 or later.
 \cs_set:Npn \@@_cline 
 %    \end{macrocode}
 % We have to act in a fully expandable way since there may be |\noalign| (in the
-% |\multispan|) to detect. That's why we  use |\exp_arg:Ne| and not |\exp_arg:Nx|.
+% |\multispan|) to detect. That's why we  use |\@@_cline_i:en|.
 %    \begin{macrocode}
-  { \exp_args:Ne \@@_cline_i:nn \l_@@_first_col_int }
+  { \@@_cline_i:en \l_@@_first_col_int }
 %    \end{macrocode}
 % The command |\cline_i:nn| has two arguments. The first is the number of the
 % current column (it \emph{must} be used in that column). The second is a
@@ -3670,11 +3652,10 @@ version 2005/12/01 or later.
 % several |\cline|).
 %    \begin{macrocode}
     \peek_meaning_remove_ignore_spaces:NTF \cline
-      { & \exp_args:Ne \@@_cline_i:nn { \@@_succ:n { #3 } } }
+      { & \@@_cline_i:en { \@@_succ:n { #3 } } }
       { \everycr { } \cr }
   }
-
-
+\cs_generate_variant:Nn \@@_cline_i:nn { e n }
 %    \end{macrocode}
 % 
 % \bigskip
@@ -5561,6 +5542,12 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \NewDocumentEnvironment { NiceArrayWithDelims } { m m O { } m ! O { } }
   { 
+%    \end{macrocode}
+% The aim of the following |\bgroup| (the corresponding |\egroup| is, of course,
+% at the end of the environment) is to be able to put an exposant to a matrix in
+% a mathematical formula.
+%    \begin{macrocode}
+    \bgroup
     \tl_set:Nn \l_@@_left_delim_tl { #1 }
     \tl_set:Nn \l_@@_right_delim_tl { #2 }
     \bool_gset_false:N \g_@@_row_of_col_done_bool
@@ -6111,7 +6098,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
         \bool_if:NTF \l_@@_max_delimiter_width_bool 
           { \@@_put_box_in_flow_bis:nn { #1 } { #2 } }
-          \@@_put_box_in_flow:
+          \@@_put_box_in_flow: 
       } 
 %    \end{macrocode}
 %
@@ -6125,6 +6112,7 @@ version 2005/12/01 or later.
         \skip_horizontal:N \arraycolsep 
       }
     \@@_after_array:
+    \egroup 
   }
 %    \end{macrocode}
 % This is the end of the environment |{NiceArrayWithDelims}|.
@@ -6142,7 +6130,7 @@ version 2005/12/01 or later.
     \box_set_ht:Nn \l_tmpa_box { \box_ht:N \l_tmpa_box + \l_tmpa_dim } 
     \box_set_dp:Nn \l_tmpa_box { \box_dp:N \l_tmpa_box + \l_tmpb_dim } 
     \str_if_eq:VnTF \l_@@_baseline_str { c }
-      { \box_use_drop:N \l_tmpa_box }
+      { \box_use_drop:N \l_tmpa_box } 
       \@@_put_box_in_flow_i:
   }
 %    \end{macrocode}
@@ -9002,7 +8990,7 @@ version 2005/12/01 or later.
 %    \end{macrocode}
 %
 % The command |\CT@arc@| is a command of \pkg{colortbl} which sets the color of
-% the rules in the array. The package \pkg{nicematrix} uses it even if
+% the rules in the array. The package \pkg{nicematrix} uses it even when
 % \pkg{colortbl} is not loaded.
 %    \begin{macrocode}
     \CT@arc@
@@ -9010,48 +8998,23 @@ version 2005/12/01 or later.
     \pgfrememberpicturepositiononpagetrue
     \pgf@relevantforpicturesizefalse
     \pgfsetlinewidth \arrayrulewidth 
-%    \end{macrocode}
-% First, we compute in |\l_tmpa_dim| the height of the rules we have to draw.
-%    \begin{macrocode}
+    \pgfsetrectcap
     \@@_qpoint:n { row - 1 }
     \dim_set_eq:NN \l_tmpa_dim \pgf@y
-    \@@_qpoint:n { row - \@@_succ:n \c@iRow } 
-    \dim_sub:Nn \l_tmpa_dim \pgf@y 
-%    \end{macrocode}
-% We translate vertically to take into account the potential ``last row''. 
-%    \begin{macrocode}
-    \dim_zero:N \l_tmpb_dim
-    \int_compare:nNnT \l_@@_last_row_int > { -1 }
-      {
-        \dim_set_eq:NN \l_tmpb_dim \g_@@_dp_last_row_dim 
-        \dim_add:Nn \l_tmpb_dim \g_@@_ht_last_row_dim 
-%    \end{macrocode}
-% We adjust the value of |\l_tmpa_dim| by the width of the horizontal rule just 
-% before the ``last row''.
-%    \begin{macrocode}
-        \@@_qpoint:n { row - \@@_succ:n \c@iRow } 
-        \dim_add:Nn \l_tmpa_dim \pgf@y
-        \@@_qpoint:n { row - \@@_succ:n \g_@@_row_total_int } 
-        \dim_sub:Nn \l_tmpa_dim \pgf@y
-        \dim_sub:Nn \l_tmpa_dim \l_tmpb_dim
-       }
-    \dim_add:Nn \l_tmpa_dim \arrayrulewidth
+    \@@_qpoint:n { row - \@@_succ:n \c@iRow }
+    \dim_set_eq:NN \l_tmpb_dim \pgf@y
 %    \end{macrocode}
 %
-%
 % Now, we can draw the vertical rules with a loop. 
 %    \begin{macrocode}
     \int_step_inline:nnn 
       { \bool_if:NTF \l_@@_NiceArray_bool 1 2 } 
       { \bool_if:NTF \l_@@_NiceArray_bool { \@@_succ:n \c@jCol } \c@jCol } 
       { 
-        \pgfpathmoveto { \@@_qpoint:n { col - ##1 } }
-        \pgfpathlineto
-          {
-            \pgfpointadd
-              { \@@_qpoint:n { col - ##1 } }
-              { \pgfpoint \c_zero_dim { \l_tmpb_dim + \l_tmpa_dim } }
-          }
+        \@@_qpoint:n { col - ##1 }
+        \dim_set_eq:NN \l_tmpc_dim \pgf@x
+        \pgfpathmoveto { \pgfpoint \l_tmpc_dim \l_tmpa_dim }
+        \pgfpathlineto { \pgfpoint \l_tmpc_dim \l_tmpb_dim }
       }
     \pgfusepathqstroke
     \endpgfpicture
@@ -9059,7 +9022,7 @@ version 2005/12/01 or later.
   }
 %    \end{macrocode}
 %
-%%
+%
 % \subsection*{The key hvlines}
 %
 %
@@ -9149,7 +9112,7 @@ version 2005/12/01 or later.
      }
 %    \end{macrocode}
 % 
-% First, the horizontal rules in the interior of the array.
+% Now, the horizontal rules in the interior of the array.
 %    \begin{macrocode}
     \int_step_variable:nnNn 2 \c@iRow \l_tmpa_tl
       {
@@ -9996,7 +9959,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_draw_blocks:
   { \seq_map_inline:Nn \g_@@_blocks_seq { \@@_Block_iii:nnnnnn ##1 } }
-%     \end{macrocode}
+%    \end{macrocode}
 %
 %    \begin{macrocode}
 \cs_new_protected:Npn \@@_Block_iii:nnnnnn #1 #2 #3 #4 #5 #6
@@ -10320,8 +10283,7 @@ version 2005/12/01 or later.
 % If this is really the end of the current environment (of \pkg{nicematrix}), we
 % put back the command |\end| and its argument in the TeX flow.
 %    \begin{macrocode}
-    \str_set:NV \l_tmpa_str \@currenvir
-    \bool_if:NTF { \str_if_eq_p:Vn \l_tmpa_str { #1 } }
+    \str_if_eq:eeTF \@currenvir { #1 } 
       { \end { #1 } }
 %    \end{macrocode}
 % It this is not the |\end| we are looking for, we put those tokens in
@@ -10520,7 +10482,7 @@ version 2005/12/01 or later.
 \@@_msg_new:nn { Unknown~option~for~xdots } 
   {
     As~for~now~there~is~only~three~options~available~here:~'color',~'line-style'~
-    and~'shorten'~(and~you~try~to~use~'\l_keys_key_str').~If~you~go~on,~
+    and~'shorten'~(and~you~try~to~use~'\l_keys_key_tl').~If~you~go~on,~
     this~option~will~be~ignored.
   }
 %    \end{macrocode}
@@ -10641,7 +10603,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \@@_msg_new:nn { Bad~value~for~letter~for~dotted~lines }
   { 
-    The~value~of~key~'\tl_use:N\l_keys_key_str'~must~be~of~length~1.\\
+    The~value~of~key~'\tl_use:N\l_keys_key_tl'~must~be~of~length~1.\\
     If~you~go~on,~it~will~be~ignored. 
   }
 %    \end{macrocode}
@@ -10650,7 +10612,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \@@_msg_new:nnn { Unknown~key~for~NiceMatrixOptions }
   {
-    The~key~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~command~
+    The~key~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~command~
     \token_to_str:N \NiceMatrixOptions. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~keys,~type~H~<return>.
@@ -10693,7 +10655,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \@@_msg_new:nnn { Unknown~option~for~NiceArray }
   { 
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~environment~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~environment~
     \{NiceArray\}. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.
@@ -10746,7 +10708,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \@@_msg_new:nnn { Unknown~option~for~NiceMatrix }
   { 
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~
     \@@_full_name_env:. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.
@@ -10798,7 +10760,7 @@ version 2005/12/01 or later.
 %    \begin{macrocode}
 \@@_msg_new:nnn { Unknown~option~for~NiceTabular }
   { 
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~environment~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~environment~
     \{NiceTabular\}. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.
@@ -11184,6 +11146,11 @@ version 2005/12/01 or later.
 % The key |hvline| don't draw rules in the blocks (commands |\Block|) and in the
 % virtual blocks corresponding to the dotted lines.
 % 
+% \subsection*{Changes between versions 4.1 and 4.2}
+% 
+% It's now possible to write |\begin{pNiceMatrix}a&b\\c&d\end{pNiceMatrix}^2|
+% with the expected result.
+% 
 % \PrintIndex
 % 
 % \tableofcontents
diff --git a/Master/texmf-dist/tex/latex/nicematrix/nicematrix.sty b/Master/texmf-dist/tex/latex/nicematrix/nicematrix.sty
index dde56d6fc32..b4a7ec1366c 100644
--- a/Master/texmf-dist/tex/latex/nicematrix/nicematrix.sty
+++ b/Master/texmf-dist/tex/latex/nicematrix/nicematrix.sty
@@ -18,8 +18,8 @@
 %% and version 1.3 or later is part of all distributions of
 %% LaTeX version 2005/12/01 or later.
 %% 
-\def\myfileversion{4.1}
-\def\myfiledate{2020/05/27}
+\def\myfileversion{4.2}
+\def\myfiledate{2020/06/07}
 \RequirePackage{pgfcore}
 \usepgfmodule{shapes}
 \RequirePackage{l3keys2e}
@@ -28,14 +28,6 @@
   {\myfiledate}
   {\myfileversion}
   {Mathematical matrices with PGF/TikZ}
-\msg_new:nnn { nicematrix } { expl3~too~old }
-  {
-    Your~version~of~LaTeX~(especially~expl3)~is~too~old.~
-    You~can~go~on~but~you~will~probably~have~other~errors~
-    if~you~use~the~functionalities~of~nicematrix.
-  }
-\cs_if_exist:NF \l_keys_key_str
-  { \msg_error:nn { nicematrix } { expl3~too~old } }
 \RequirePackage { array }
 \RequirePackage { amsmath }
 \RequirePackage { xparse }
@@ -98,8 +90,7 @@
     \cs_set_eq:NN \__nicematrix_old_pgfutil@check@rerun \pgfutil@check@rerun
     \cs_set_protected:Npn \pgfutil@check@rerun ##1 ##2
       {
-        \str_set:Nx \l_tmpa_str { \tl_range:nnn { ##1 } 1 3 }
-        \str_if_eq:VnF \l_tmpa_str { nm- }
+        \str_if_eq:eeF { nm- } { \tl_range:nnn { ##1 } 1 3 }
           { \__nicematrix_old_pgfutil@check@rerun { ##1 } { ##2 } }
       }
   }
@@ -140,7 +131,7 @@
     \noalign { \skip_vertical:N -\arrayrulewidth }
   }
 \cs_set:Npn \__nicematrix_cline
-  { \exp_args:Ne \__nicematrix_cline_i:nn \l__nicematrix_first_col_int }
+  { \__nicematrix_cline_i:en \l__nicematrix_first_col_int }
 \cs_set:Npn \__nicematrix_cline_i:nn #1 #2 { \__nicematrix_cline_i:w #1-#2 \q_stop }
 \cs_set:Npn \__nicematrix_cline_i:w #1-#2-#3 \q_stop
   {
@@ -149,10 +140,10 @@
     \multispan { \int_eval:n { #3 - #2 + 1 } }
       { \CT@arc@ \leaders \hrule \@height \arrayrulewidth \hfill }
     \peek_meaning_remove_ignore_spaces:NTF \cline
-      { & \exp_args:Ne \__nicematrix_cline_i:nn { \__nicematrix_succ:n { #3 } } }
+      { & \__nicematrix_cline_i:en { \__nicematrix_succ:n { #3 } } }
       { \everycr { } \cr }
   }
-
+\cs_generate_variant:Nn \__nicematrix_cline_i:nn { e n }
 \cs_new:Npn \__nicematrix_succ:n #1 { \the \numexpr #1 + 1 \relax }
 \cs_new:Npn \__nicematrix_pred:n #1 { \the \numexpr #1 - 1 \relax }
 \cs_new:Npn \__nicematrix_math_toggle_token:
@@ -924,6 +915,7 @@
  }
 \NewDocumentEnvironment { NiceArrayWithDelims } { m m O { } m ! O { } }
   {
+    \bgroup
     \tl_set:Nn \l__nicematrix_left_delim_tl { #1 }
     \tl_set:Nn \l__nicematrix_right_delim_tl { #2 }
     \bool_gset_false:N \g__nicematrix_row_of_col_done_bool
@@ -1238,6 +1230,7 @@
         \skip_horizontal:N \arraycolsep
       }
     \__nicematrix_after_array:
+    \egroup
   }
 \cs_new_protected:Npn \__nicematrix_put_box_in_flow:
   {
@@ -3027,39 +3020,24 @@
     \pgfrememberpicturepositiononpagetrue
     \pgf@relevantforpicturesizefalse
     \pgfsetlinewidth \arrayrulewidth
+    \pgfsetrectcap
     \__nicematrix_qpoint:n { row - 1 }
     \dim_set_eq:NN \l_tmpa_dim \pgf@y
     \__nicematrix_qpoint:n { row - \__nicematrix_succ:n \c@iRow }
-    \dim_sub:Nn \l_tmpa_dim \pgf@y
-    \dim_zero:N \l_tmpb_dim
-    \int_compare:nNnT \l__nicematrix_last_row_int > { -1 }
-      {
-        \dim_set_eq:NN \l_tmpb_dim \g__nicematrix_dp_last_row_dim
-        \dim_add:Nn \l_tmpb_dim \g__nicematrix_ht_last_row_dim
-        \__nicematrix_qpoint:n { row - \__nicematrix_succ:n \c@iRow }
-        \dim_add:Nn \l_tmpa_dim \pgf@y
-        \__nicematrix_qpoint:n { row - \__nicematrix_succ:n \g__nicematrix_row_total_int }
-        \dim_sub:Nn \l_tmpa_dim \pgf@y
-        \dim_sub:Nn \l_tmpa_dim \l_tmpb_dim
-       }
-    \dim_add:Nn \l_tmpa_dim \arrayrulewidth
+    \dim_set_eq:NN \l_tmpb_dim \pgf@y
     \int_step_inline:nnn
       { \bool_if:NTF \l__nicematrix_NiceArray_bool 1 2 }
       { \bool_if:NTF \l__nicematrix_NiceArray_bool { \__nicematrix_succ:n \c@jCol } \c@jCol }
       {
-        \pgfpathmoveto { \__nicematrix_qpoint:n { col - ##1 } }
-        \pgfpathlineto
-          {
-            \pgfpointadd
-              { \__nicematrix_qpoint:n { col - ##1 } }
-              { \pgfpoint \c_zero_dim { \l_tmpb_dim + \l_tmpa_dim } }
-          }
+        \__nicematrix_qpoint:n { col - ##1 }
+        \dim_set_eq:NN \l_tmpc_dim \pgf@x
+        \pgfpathmoveto { \pgfpoint \l_tmpc_dim \l_tmpa_dim }
+        \pgfpathlineto { \pgfpoint \l_tmpc_dim \l_tmpb_dim }
       }
     \pgfusepathqstroke
     \endpgfpicture
     \group_end:
   }
-%%
 \cs_new_protected:Npn \__nicematrix_draw_hlines:
   {
     \pgfpicture
@@ -3715,8 +3693,7 @@
   }
 \cs_new_protected:Npn \__nicematrix_CodeAfter_i:n #1
   {
-    \str_set:NV \l_tmpa_str \@currenvir
-    \bool_if:NTF { \str_if_eq_p:Vn \l_tmpa_str { #1 } }
+    \str_if_eq:eeTF \@currenvir { #1 }
       { \end { #1 } }
       {
         \tl_gput_right:Nn \g__nicematrix_code_after_tl { \end { #1 } }
@@ -3826,7 +3803,7 @@
 \__nicematrix_msg_new:nn { Unknown~option~for~xdots }
   {
     As~for~now~there~is~only~three~options~available~here:~'color',~'line-style'~
-    and~'shorten'~(and~you~try~to~use~'\l_keys_key_str').~If~you~go~on,~
+    and~'shorten'~(and~you~try~to~use~'\l_keys_key_tl').~If~you~go~on,~
     this~option~will~be~ignored.
   }
 \__nicematrix_msg_new:nn { ampersand~in~light-syntax }
@@ -3901,12 +3878,12 @@
   }
 \__nicematrix_msg_new:nn { Bad~value~for~letter~for~dotted~lines }
   {
-    The~value~of~key~'\tl_use:N\l_keys_key_str'~must~be~of~length~1.\\
+    The~value~of~key~'\tl_use:N\l_keys_key_tl'~must~be~of~length~1.\\
     If~you~go~on,~it~will~be~ignored.
   }
 \__nicematrix_msg_new:nnn { Unknown~key~for~NiceMatrixOptions }
   {
-    The~key~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~command~
+    The~key~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~command~
     \token_to_str:N \NiceMatrixOptions. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~keys,~type~H~<return>.
@@ -3946,7 +3923,7 @@
   }
 \__nicematrix_msg_new:nnn { Unknown~option~for~NiceArray }
   {
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~environment~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~environment~
     \{NiceArray\}. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.
@@ -3992,7 +3969,7 @@
   }
 \__nicematrix_msg_new:nnn { Unknown~option~for~NiceMatrix }
   {
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~
     \__nicematrix_full_name_env:. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.
@@ -4041,7 +4018,7 @@
   }
 \__nicematrix_msg_new:nnn { Unknown~option~for~NiceTabular }
   {
-    The~option~'\tl_use:N\l_keys_key_str'~is~unknown~for~the~environment~
+    The~option~'\tl_use:N\l_keys_key_tl'~is~unknown~for~the~environment~
     \{NiceTabular\}. \\
     If~you~go~on,~it~will~be~ignored. \\
     For~a~list~of~the~*principal*~available~options,~type~H~<return>.