Merge pull request matplotlib#8822 from pierre-haessig/axlines-doc

fix vlines spelling in docstring

Author: efiring

lib/matplotlib/axes/_axes.py

@@ -705,7 +705,7 @@ def axhline(self, y=0, xmin=0, xmax=1, **kwargs):
 
         See also
         --------
-        hline : add horizontal lines in data coordinates
+        hlines : add horizontal lines in data coordinates
         axhspan : add a horizontal span (rectangle) across the axis
         """
 
@@ -772,7 +772,7 @@ def axvline(self, x=0, ymin=0, ymax=1, **kwargs):
 
         See also
         --------
-        vline : add vertical lines in data coordinates
+        vlines : add vertical lines in data coordinates
         axvspan : add a vertical span (rectangle) across the axis
         """