From 2158fd6705651bfc5077279f9d796ee5290992d5 Mon Sep 17 00:00:00 2001
From: Jens Hedegaard Nielsen <jenshnielsen@gmail.com>
Date: Fri, 8 May 2015 11:01:44 +0200
Subject: [PATCH] Merge pull request #4403 from
 mdboom/whitespace-symbols-mathtext

Fix #4335: mathtext whitespacing commands
---
 doc/api/api_changes.rst                       |   6 ++
 lib/matplotlib/_mathtext_data.py              |   2 -
 lib/matplotlib/mathtext.py                    |  19 ++--
 .../test_mathtext/mathtext_cm_68.pdf          | Bin 6294 -> 6299 bytes
 .../test_mathtext/mathtext_cm_69.pdf          | Bin 7604 -> 7608 bytes
 .../test_mathtext/mathtext_cm_70.pdf          | Bin 0 -> 3606 bytes
 .../test_mathtext/mathtext_cm_70.png          | Bin 0 -> 1242 bytes
 .../test_mathtext/mathtext_cm_70.svg          |  97 ++++++++++++++++++
 .../test_mathtext/mathtext_stix_68.pdf        | Bin 6097 -> 6102 bytes
 .../test_mathtext/mathtext_stix_69.pdf        | Bin 5907 -> 5911 bytes
 .../test_mathtext/mathtext_stix_70.pdf        | Bin 0 -> 3381 bytes
 .../test_mathtext/mathtext_stix_70.png        | Bin 0 -> 1241 bytes
 .../test_mathtext/mathtext_stix_70.svg        |  74 +++++++++++++
 .../test_mathtext/mathtext_stixsans_68.pdf    | Bin 6113 -> 6118 bytes
 .../test_mathtext/mathtext_stixsans_69.pdf    | Bin 5879 -> 5883 bytes
 .../test_mathtext/mathtext_stixsans_70.pdf    | Bin 0 -> 3335 bytes
 .../test_mathtext/mathtext_stixsans_70.png    | Bin 0 -> 1245 bytes
 .../test_mathtext/mathtext_stixsans_70.svg    |  55 ++++++++++
 lib/matplotlib/tests/test_mathtext.py         |   3 +-
 19 files changed, 246 insertions(+), 10 deletions(-)
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_70.pdf
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_70.png
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_cm_70.svg
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stix_70.pdf
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stix_70.png
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stix_70.svg
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stixsans_70.pdf
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stixsans_70.png
 create mode 100644 lib/matplotlib/tests/baseline_images/test_mathtext/mathtext_stixsans_70.svg

diff --git a/doc/api/api_changes.rst b/doc/api/api_changes.rst
index be878d0a7dc7..3727aa434925 100644
--- a/doc/api/api_changes.rst
+++ b/doc/api/api_changes.rst
@@ -11,6 +11,12 @@ help figure out possible sources of the changes you are experiencing.
 For new features that were added to matplotlib, please see
 :ref:`whats-new`.
 
+Changes in 2.0.x
+================
+
+* The spacing commands in mathtext have been changed to more closely
+  match vanilla TeX.
+
 Changes in 1.4.x
 ================
 
diff --git a/lib/matplotlib/_mathtext_data.py b/lib/matplotlib/_mathtext_data.py
index eb741d913278..cb87d445cd48 100644
--- a/lib/matplotlib/_mathtext_data.py
+++ b/lib/matplotlib/_mathtext_data.py
@@ -1946,7 +1946,6 @@
     'boxminus'                 : 8863,
     'equiv'                    : 8801,
     'Lleftarrow'               : 8666,
-    'thinspace'                : 8201,
     'll'                       : 8810,
     'Cup'                      : 8915,
     'measeq'                   : 8798,
@@ -2169,7 +2168,6 @@
     'cdots'                    : 8943,
     'hat'                      : 770,
     'eqgtr'                    : 8925,
-    'enspace'                  : 8194,
     'psi'                      : 968,
     'frown'                    : 8994,
     'acute'                    : 769,
diff --git a/lib/matplotlib/mathtext.py b/lib/matplotlib/mathtext.py
index cbe8bfd6bdd4..69c110ba9a04 100644
--- a/lib/matplotlib/mathtext.py
+++ b/lib/matplotlib/mathtext.py
@@ -2431,13 +2431,18 @@ def _make_space(self, percentage):
             self._em_width_cache[key] = width
         return Kern(width * percentage)
 
-    _space_widths = { r'\ '      : 0.3,
-                      r'\,'      : 0.4,
-                      r'\;'      : 0.8,
-                      r'\quad'   : 1.6,
-                      r'\qquad'  : 3.2,
-                      r'\!'      : -0.4,
-                      r'\/'      : 0.4 }
+    _space_widths = { r'\,'         : 0.16667,  # 3/18 em = 3 mu
+                      r'\thinspace' : 0.16667,  # 3/18 em = 3 mu
+                      r'\/'         : 0.16667,  # 3/18 em = 3 mu
+                      r'\>'         : 0.22222,  # 4/18 em = 4 mu
+                      r'\:'         : 0.22222,  # 4/18 em = 4 mu
+                      r'\;'         : 0.27778,  # 5/18 em = 5 mu
+                      r'\ '         : 0.33333,  # 6/18 em = 6 mu
+                      r'\enspace'   : 0.5,      # 9/18 em = 9 mu
+                      r'\quad'      : 1,        # 1 em = 18 mu
+                      r'\qquad'     : 2,        # 2 em = 36 mu
+                      r'\!'         : -0.16667, # -3/18 em = -3 mu
+                      }
     def space(self, s, loc, toks):
         assert(len(toks)==1)
         num = self._space_widths[toks[0]]
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new file mode 100644
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diff --git a/lib/matplotlib/tests/test_mathtext.py b/lib/matplotlib/tests/test_mathtext.py
index cec257de255b..9b3ac7ea8e54 100644
--- a/lib/matplotlib/tests/test_mathtext.py
+++ b/lib/matplotlib/tests/test_mathtext.py
@@ -94,7 +94,8 @@
     r'$\operatorname{cos} x$', # github issue #553
     r'$\sum _{\genfrac{}{}{0}{}{0\leq i\leq m}{0<j<n}}P\left(i,j\right)$',
     r"$\left\Vert a \right\Vert \left\vert b \right\vert \left| a \right| \left\| b\right\| \Vert a \Vert \vert b \vert$",
-    r'$\mathring{A}  \stackrel{\circ}{A}  \AA$'
+    r'$\mathring{A}  \stackrel{\circ}{A}  \AA$',
+    r'$M \, M \thinspace M \/ M \> M \: M \; M \ M \enspace M \quad M \qquad M \! M$'
 ]
 
 digits = "0123456789"