Add \dddot and \ddddot as accents in mathtext (#20605)

danzimmerman · web-flow · commit 0dd603f64290 · 2021-07-10T03:14:58.000+02:00
diff --git a/lib/matplotlib/_mathtext.py b/lib/matplotlib/_mathtext.py
@@ -2441,6 +2441,8 @@ def c_over_c(self, s, loc, toks):
         r'tilde':          r'\combiningtilde',
         r'dot':            r'\combiningdotabove',
         r'ddot':           r'\combiningdiaeresis',
+        r'dddot':          r'\combiningthreedotsabove',
+        r'ddddot':         r'\combiningfourdotsabove',
         r'vec':            r'\combiningrightarrowabove',
         r'"':              r'\combiningdiaeresis',
         r"`":              r'\combininggraveaccent',
diff --git a/lib/matplotlib/_mathtext_data.py b/lib/matplotlib/_mathtext_data.py
@@ -1166,6 +1166,8 @@
     'combiningtilde'           : 771,
     'combiningrightarrowabove' : 8407,
     'combiningdotabove'        : 775,
+    'combiningthreedotsabove'  : 8411,
+    'combiningfourdotsabove'   : 8412,
     'to'                       : 8594,
     'succeq'                   : 8829,
     'emptyset'                 : 8709,
diff --git a/tutorials/text/mathtext.py b/tutorials/text/mathtext.py
@@ -308,8 +308,10 @@
     ``\acute a`` or ``\'a``        :mathmpl:`\acute a`
     ``\bar a``                     :mathmpl:`\bar a`
     ``\breve a``                   :mathmpl:`\breve a`
-    ``\ddot a`` or ``\''a``        :mathmpl:`\ddot a`
     ``\dot a`` or ``\.a``          :mathmpl:`\dot a`
+    ``\ddot a`` or ``\''a``        :mathmpl:`\ddot a`
+    ``\dddot a``                   :mathmpl:`\dddot a`
+    ``\ddddot a``                  :mathmpl:`\ddddot a`
     ``\grave a`` or ``\`a``        :mathmpl:`\grave a`
     ``\hat a`` or ``\^a``          :mathmpl:`\hat a`
     ``\tilde a`` or ``\~a``        :mathmpl:`\tilde a`
