Fix typing and doc

Author: timhoffm

doc/api/pyplot_summary.rst

@@ -61,6 +61,7 @@ Basic
    bar
    barh
    bar_label
+   grouped_bar
    stem
    eventplot
    pie

galleries/examples/lines_bars_and_markers/grouped_bar_chart.py

@@ -42,7 +42,7 @@
 # Case 1b: multiple datasets as dict
 # ----------------------------------
 # instead of carrying a list of datasets and a list of dataset labels, users may
-# want to organized their datasets in a dict.
+# want to organize their datasets in a dict.
 
 datasets = {
     'data1': data1,
@@ -150,7 +150,7 @@
 # -------
 # The bars can be styled through additional keyword arguments. Currently,
 # the only per-dataset setting is ``colors``. Additionally, all
-# `.Rectangle parameters` are passed through and applied to all datasets.
+# `.Rectangle` parameters are passed through and applied to all datasets.
 
 x = ['A', 'B', 'C']
 data = {

lib/matplotlib/axes/_axes.pyi

@@ -282,7 +282,7 @@ class Axes(_AxesBase):
     def grouped_bar(
         self,
         x : ArrayLike,
-        heights : ArrayLike,
+        heights : Sequence[ArrayLike] | dict[str, ArrayLike] | np.ndarray,
         *,
         group_spacing : float | None = ...,
         bar_spacing : float | None = ...,

lib/matplotlib/pyplot.py

@@ -3392,7 +3392,7 @@ def grid(
 @_copy_docstring_and_deprecators(Axes.grouped_bar)
 def grouped_bar(
     x: ArrayLike,
-    heights: ArrayLike,
+    heights: Sequence[ArrayLike] | dict[str, ArrayLike] | np.ndarray,
     *,
     group_spacing: float | None = 1.5,
     bar_spacing: float | None = 0,