diff -r -U2 matplotlib-2.1.2.orig/doc/conf.py matplotlib-2.1.2/doc/conf.py
--- matplotlib-2.1.2.orig/doc/conf.py	2018-01-19 11:07:49.000000000 +0700
+++ matplotlib-2.1.2/doc/conf.py	2018-01-21 20:06:44.120901546 +0700
@@ -136,5 +136,5 @@
 }
 
-plot_gallery = 'True'
+plot_gallery = True
 
 # Add any paths that contain templates here, relative to this directory.
