missing a colon in docstring

Author: immaxchen

lib/matplotlib/axes/_axes.py

@@ -2531,7 +2531,7 @@ def bar_label(self, container, labels=None, *, fmt="%g", position="edge",
         shifting : float, default: 0
             Offset in points perpendicular to the direction of the bar.
 
-        **kwargs is passed through to `.Axes.annotate`.
+        **kwargs : passed through to `.Axes.annotate`.
 
         Returns
         -------