print version number when building docs

Author: story645

doc/conf.py

@@ -24,6 +24,9 @@
 from datetime import datetime
 import time
 
+# debug that building expected version
+print(f"Building Documentation for Matplotlib: {matplotlib.__version__}")
+
 # Release mode enables optimizations and other related options.
 is_release_build = tags.has('release')  # noqa