Fix whitespace in _axes.py error message

brchristian · web-flow · commit c4e93566b793 · 2025-07-10T14:42:56.000-07:00
This fixes issue #30285.
diff --git a/lib/matplotlib/axes/_axes.py b/lib/matplotlib/axes/_axes.py
@@ -2296,7 +2296,7 @@ def _parse_bar_color_args(self, kwargs):
             facecolor = mcolors.to_rgba_array(facecolor)
         except ValueError as err:
             raise ValueError(
-                "'facecolor' or 'color' argument must be a valid color or"
+                "'facecolor' or 'color' argument must be a valid color or "
                     "sequence of colors."
             ) from err
 
