Update lib/matplotlib/layout_engine.py

Co-authored-by: Mecanerd <[email protected]>

Author: timhoffm

lib/matplotlib/layout_engine.py

@@ -10,7 +10,7 @@
 layout engine while the figure is being created.  In particular, colorbars are
 made differently with different layout engines (for historical reasons).
 
-Matplotlib has two built-in two layout engines:
+Matplotlib has two built-in layout engines:
 
 - `.TightLayoutEngine` was the first layout engine added to Matplotlib.
   See also :ref:`tight_layout_guide`.