diff --git a/lib/matplotlib/artist.py b/lib/matplotlib/artist.py
index aa1e2e376350..6ce0b5eed413 100644
--- a/lib/matplotlib/artist.py
+++ b/lib/matplotlib/artist.py
@@ -1308,18 +1308,12 @@ def _get_setters_and_targets(self):
             if not name.startswith('set_'):
                 continue
             func = getattr(self.o, name)
-            if not callable(func):
+            if (not callable(func)
+                    or len(inspect.signature(func).parameters) < 2
+                    or self.is_alias(func)):
                 continue
-            nargs = len(inspect.getfullargspec(func).args)
-            if nargs < 2 or self.is_alias(func):
-                continue
-            source_class = self.o.__module__ + "." + self.o.__name__
-            for cls in self.o.mro():
-                if name in cls.__dict__:
-                    source_class = cls.__module__ + "." + cls.__name__
-                    break
-            source_class = self._replace_path(source_class)
-            setters.append((name[4:], source_class + "." + name))
+            setters.append(
+                (name[4:], f"{func.__module__}.{func.__qualname__}"))
         return setters
 
     def _replace_path(self, source_class):
diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
index 995c9242fdf2..da89c6a0ae95 100644
--- a/lib/matplotlib/patches.py
+++ b/lib/matplotlib/patches.py
@@ -1733,47 +1733,33 @@ def draw_bbox(bbox, renderer, color='k', trans=None):
     r.draw(renderer)
 
 
-def _pprint_table(table, leadingspace=2):
+def _pprint_styles(_styles):
     """
-    Given the list of list of strings, return a string of REST table format.
+    A helper function for the _Style class.  Given the dictionary of
+    {stylename: styleclass}, return a formatted string listing all the
+    styles. Used to update the documentation.
     """
+    table = [('Class', 'Name', 'Attrs'),
+             *[(cls.__name__,
+                # adding backquotes since - and | have special meaning in reST
+                f'``{name}``',
+                # [1:-1] drops the surrounding parentheses.
+                str(inspect.signature(cls))[1:-1] or 'None')
+               for name, cls in sorted(_styles.items())]]
+    # Convert to rst table.
     col_len = [max(len(cell) for cell in column) for column in zip(*table)]
-    table_formatstr = '   '.join('=' * cl for cl in col_len)
-    lines = [
+    table_formatstr = '  '.join('=' * cl for cl in col_len)
+    rst_table = '\n'.join([
         '',
         table_formatstr,
-        '   '.join(cell.ljust(cl) for cell, cl in zip(table[0], col_len)),
+        '  '.join(cell.ljust(cl) for cell, cl in zip(table[0], col_len)),
         table_formatstr,
-        *['   '.join(cell.ljust(cl) for cell, cl in zip(row, col_len))
+        *['  '.join(cell.ljust(cl) for cell, cl in zip(row, col_len))
           for row in table[1:]],
         table_formatstr,
         '',
-    ]
-    return textwrap.indent('\n'.join(lines), ' ' * leadingspace)
-
-
-def _pprint_styles(_styles):
-    """
-    A helper function for the _Style class.  Given the dictionary of
-    {stylename: styleclass}, return a formatted string listing all the
-    styles. Used to update the documentation.
-    """
-    import inspect
-
-    _table = [["Class", "Name", "Attrs"]]
-
-    for name, cls in sorted(_styles.items()):
-        spec = inspect.getfullargspec(cls.__init__)
-        if spec.defaults:
-            argstr = ", ".join(map(
-                "{}={}".format, spec.args[-len(spec.defaults):], spec.defaults
-            ))
-        else:
-            argstr = 'None'
-        # adding ``quotes`` since - and | have special meaning in reST
-        _table.append([cls.__name__, "``%s``" % name, argstr])
-
-    return _pprint_table(_table)
+    ])
+    return textwrap.indent(rst_table, prefix=' ' * 2)
 
 
 def _simpleprint_styles(_styles):