Fix typo in mathtext_data.

anntzer · anntzer · commit f5d2a77b72aa · 2020-07-29T23:06:47.000+02:00
As can be checked with
```
rcParams["ps.useafm"] = True
figtext(.5, .5, "$\\Lambda\varphi$")
savefig("/tmp/test.ps")
```
and inspecting the resulting file.
diff --git a/doc/api/next_api_changes/deprecations/18004-AL.rst b/doc/api/next_api_changes/deprecations/18004-AL.rst
@@ -0,0 +1,4 @@
+*facename* parameter of `.mathtext.Fonts.render_glyph`
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This parameter was renamed to *font* for consistency with the rest of the
+`.Fonts` API.
diff --git a/lib/matplotlib/_mathtext_data.py b/lib/matplotlib/_mathtext_data.py
@@ -273,7 +273,7 @@
     r'\gamma'                    : ('psyr', 103),
     r'\eta'                      : ('psyr', 104),
     r'\iota'                     : ('psyr', 105),
-    r'\varpsi'                   : ('psyr', 106),
+    r'\varphi'                   : ('psyr', 106),
     r'\kappa'                    : ('psyr', 108),
     r'\nu'                       : ('psyr', 110),
     r'\pi'                       : ('psyr', 112),
@@ -360,7 +360,7 @@
     r'\prime'                    : ('psyr', 0o242),
     r'\sharp'                    : ('psyr', 0o43),
     r'\slash'                    : ('psyr', 0o57),
-    r'\Lamda'                    : ('psyr', 0o114),
+    r'\Lambda'                   : ('psyr', 0o114),
     r'\neg'                      : ('psyr', 0o330),
     r'\Upsilon'                  : ('psyr', 0o241),
     r'\rightbrace'               : ('psyr', 0o175),
diff --git a/lib/matplotlib/mathtext.py b/lib/matplotlib/mathtext.py
@@ -419,12 +419,13 @@ def get_metrics(self, font, font_class, sym, fontsize, dpi, math=True):
         Parameters
         ----------
         font : str
-            One of the TeX font names: tt, it, rm, cal, sf, bf, default/regular
-            (non-math), bb, frak, scr.
+            One of the TeX font names: "tt", "it", "rm", "cal", "sf", "bf",
+            "default", "regular", "bb", "frak", "scr".  "default" and "regular"
+            are synonyms and use the non-math font.
         font_class : str
             One of the TeX font names (as for *font*), but **not** bb, frak, or
-            scr.  This is used to combine e.g. "frak" with "bf" (the only
-            combination that currently actually works).
+            scr.  This is used to combine two font classes.  The only supported
+            combination currently is ``get_metrics("frak", "bf", ...)``.
         sym : str
             A symbol in raw TeX form, e.g., "1", "x", or "\sigma".
         fontsize : float
@@ -462,12 +463,13 @@ def set_canvas_size(self, w, h, d):
         self.mathtext_backend.set_canvas_size(
             self.width, self.height, self.depth)
 
-    def render_glyph(self, ox, oy, facename, font_class, sym, fontsize, dpi):
+    @cbook._rename_parameter("3.4", "facename", "font")
+    def render_glyph(self, ox, oy, font, font_class, sym, fontsize, dpi):
         """
         At position (*ox*, *oy*), draw the glyph specified by the remaining
         parameters (see `get_metrics` for their detailed description).
         """
-        info = self._get_info(facename, font_class, sym, fontsize, dpi)
+        info = self._get_info(font, font_class, sym, fontsize, dpi)
         self.used_characters.setdefault(info.font.fname, set()).add(info.num)
         self.mathtext_backend.render_glyph(ox, oy, info)
 
