From ba0d0272174297d0cb877b6ec8029f86711220eb Mon Sep 17 00:00:00 2001
From: Bruce Miller <nebconinc@gmail.com>
Date: Sun, 29 Sep 2024 17:06:07 -0400
Subject: [PATCH] Slightly better choice of space chars, updating tests

---
 lib/LaTeXML/Engine/TeX_Glue.pool.ltxml | 10 ++++--
 t/alignment/tabular.xml                |  4 +--
 t/complex/figure_mixed_content.xml     | 48 +++++++++++++-------------
 t/fonts/sizes.xml                      |  6 ++--
 4 files changed, 37 insertions(+), 31 deletions(-)

diff --git a/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml b/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
index 1e971c04d..002e2940a 100644
--- a/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
+++ b/lib/LaTeXML/Engine/TeX_Glue.pool.ltxml
@@ -27,8 +27,14 @@ use LaTeXML::Package;
 # \unskip           c  removes a glue item from the current list.
 
 our @spaces = (    # Spaces to fake spacing, with width in ems
-  [0.167, "\x{2006}"], [0.222, "\x{2005}"], [0.278, "\x{2004}"],
-  [0.333, UTF(0xA0)],  [0.5,   "\x{2002}"], [1.0,   "\x{2003}"]);
+  [0.100, "\x{200A}"],    # Hair space (thinner than thin space)
+  [0.167, "\x{2006}"],    # six-per-em
+  [0.200, "\x{2009}"],    # five-per-em, thin space
+  [0.250, "\x{2005}"],    # four-per-em, mid space
+  [0.333, "\x{2004}"],    # three-per-em, thick space
+  [0.500, "\x{2002}"],    # en-quad, "nut"
+  [1.000, "\x{2003}"],    # em-quad, "mutton"
+);
 
 # String of spacing chars with width roughly equivalent to $dimen
 sub DimensionToSpaces {
diff --git a/t/alignment/tabular.xml b/t/alignment/tabular.xml
index a6ba4c8d7..b7cd9df21 100644
--- a/t/alignment/tabular.xml
+++ b/t/alignment/tabular.xml
@@ -77,7 +77,7 @@
     <tabular vattach="middle">
       <tbody>
         <tr>
-          <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top">1 <inline-block vattach="top">
+          <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top">1  <inline-block vattach="top">
               <p width="30.0pt">a</p>
             </inline-block>2</td>
           <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top"><inline-block vattach="top">
@@ -88,7 +88,7 @@
             </inline-block>4</td>
         </tr>
         <tr>
-          <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top">1 <inline-block vattach="top">
+          <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top">1  <inline-block vattach="top">
               <p width="30.0pt">a a a a a a a a a a</p>
             </inline-block>2</td>
           <td align="justify" class="ltx_nopad_l ltx_nopad_r" vattach="top"><inline-block vattach="top">
diff --git a/t/complex/figure_mixed_content.xml b/t/complex/figure_mixed_content.xml
index 23c121be3..0b94777c0 100644
--- a/t/complex/figure_mixed_content.xml
+++ b/t/complex/figure_mixed_content.xml
@@ -557,22 +557,22 @@
           <listingline xml:id="alg2.l16"><tags>
               <tag><text fontsize="80%">16:</text></tag>
               <tag role="refnum">16</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l17"><tags>
               <tag><text fontsize="80%">17:</text></tag>
               <tag role="refnum">17</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l18"><tags>
               <tag><text fontsize="80%">18:</text></tag>
               <tag role="refnum">18</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l19"><tags>
               <tag><text fontsize="80%">19:</text></tag>
               <tag role="refnum">19</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l20"><tags>
               <tag><text fontsize="80%">20:</text></tag>
@@ -582,42 +582,42 @@
           <listingline xml:id="alg2.l21"><tags>
               <tag><text fontsize="80%">21:</text></tag>
               <tag role="refnum">21</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l22"><tags>
               <tag><text fontsize="80%">22:</text></tag>
               <tag role="refnum">22</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l23"><tags>
               <tag><text fontsize="80%">23:</text></tag>
               <tag role="refnum">23</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l24"><tags>
               <tag><text fontsize="80%">24:</text></tag>
               <tag role="refnum">24</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l25"><tags>
               <tag><text fontsize="80%">25:</text></tag>
               <tag role="refnum">25</tag>
-            </tags>         line
+            </tags>           line
 </listingline>
           <listingline xml:id="alg2.l26"><tags>
               <tag><text fontsize="80%">26:</text></tag>
               <tag role="refnum">26</tag>
-            </tags>         line
+            </tags>           line
 </listingline>
           <listingline xml:id="alg2.l27"><tags>
               <tag><text fontsize="80%">27:</text></tag>
               <tag role="refnum">27</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l28"><tags>
               <tag><text fontsize="80%">28:</text></tag>
               <tag role="refnum">28</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg2.l29"><tags>
               <tag><text fontsize="80%">29:</text></tag>
@@ -745,7 +745,7 @@
           <listingline xml:id="alg3.l10"><tags>
               <tag><text fontsize="80%">10:</text></tag>
               <tag role="refnum">10</tag>
-            </tags>      line
+            </tags>       line
 </listingline>
           <listingline xml:id="alg3.l11"><tags>
               <tag><text fontsize="80%">11:</text></tag>
@@ -799,7 +799,7 @@
           <listingline xml:id="alg4.l4"><tags>
               <tag><text fontsize="80%">4:</text></tag>
               <tag role="refnum">4</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l5"><tags>
               <tag><text fontsize="80%">5:</text></tag>
@@ -831,32 +831,32 @@
           <listingline xml:id="alg4.l10"><tags>
               <tag><text fontsize="80%">10:</text></tag>
               <tag role="refnum">10</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l11"><tags>
               <tag><text fontsize="80%">11:</text></tag>
               <tag role="refnum">11</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l12"><tags>
               <tag><text fontsize="80%">12:</text></tag>
               <tag role="refnum">12</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l13"><tags>
               <tag><text fontsize="80%">13:</text></tag>
               <tag role="refnum">13</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l14"><tags>
               <tag><text fontsize="80%">14:</text></tag>
               <tag role="refnum">14</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l15"><tags>
               <tag><text fontsize="80%">15:</text></tag>
               <tag role="refnum">15</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l16"><tags>
               <tag><text fontsize="80%">16:</text></tag>
@@ -866,22 +866,22 @@
           <listingline xml:id="alg4.l17"><tags>
               <tag><text fontsize="80%">17:</text></tag>
               <tag role="refnum">17</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l18"><tags>
               <tag><text fontsize="80%">18:</text></tag>
               <tag role="refnum">18</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l19"><tags>
               <tag><text fontsize="80%">19:</text></tag>
               <tag role="refnum">19</tag>
-            </tags>     line
+            </tags>     line
 </listingline>
           <listingline xml:id="alg4.l20"><tags>
               <tag><text fontsize="80%">20:</text></tag>
               <tag role="refnum">20</tag>
-            </tags>    line
+            </tags>    line
 </listingline>
           <listingline xml:id="alg4.l21"><tags>
               <tag><text fontsize="80%">21:</text></tag>
diff --git a/t/fonts/sizes.xml b/t/fonts/sizes.xml
index 1be497e92..f6ee79157 100644
--- a/t/fonts/sizes.xml
+++ b/t/fonts/sizes.xml
@@ -225,10 +225,10 @@
       <p>Math: ‘’ is -1.66663pt x 0.0pt + 0.0pt.</p>
     </para>
     <para class="ltx_noindent" xml:id="S6.p4">
-      <p>Math: ‘ ’ is 2.22217pt x 0.0pt + 0.0pt.</p>
+      <p>Math: ‘ ’ is 2.22217pt x 0.0pt + 0.0pt.</p>
     </para>
     <para class="ltx_noindent" xml:id="S6.p5">
-      <p>Math: ‘ ’ is 2.77771pt x 0.0pt + 0.0pt.</p>
+      <p>Math: ‘ ’ is 2.77771pt x 0.0pt + 0.0pt.</p>
     </para>
     <para class="ltx_noindent" xml:id="S6.p6">
       <p>Math: ‘<Math mode="inline" tex="a" text="a" xml:id="S6.p6.m1">
@@ -366,7 +366,7 @@
         </Math>’ is 18.62154pt x 7.5pt + 2.5pt.</p>
     </para>
     <para class="ltx_noindent" xml:id="S6.p18">
-      <p>Math: ‘   ’ is 18.62154pt x 7.5pt + 2.5pt.</p>
+      <p>Math: ‘   ’ is 18.62154pt x 7.5pt + 2.5pt.</p>
     </para>
   </section>
   <section inlist="toc" xml:id="S7">