Ignore generated documentation sources in git (facebookresearch#162)

Summary:
We generate a lot of source files as part of our documentation build process. These are generated files and should not be checked in
Pull Request resolved: facebookresearch#162

Reviewed By: bethebunny

Differential Revision: D13553414

Pulled By: m3rlin45

fbshipit-source-id: d685a4402d74af3d8a680d72cb48e574ce68584b

Author: m3rlin45

.gitignore

@@ -31,4 +31,8 @@ venv.bak/
 *~
 
 # Coverage Files
-.coverage
+.coverage
+
+# Generated Document Sources
+pytext/docs/source/configs/*
+pytext/docs/source/modules/*