Fix

Author: Pierre-Sassoulas

doc/conf.py

@@ -64,10 +64,10 @@
     "user_guide/message-control": "messages/message_control.html",
     "technical_reference/c_extensions": "../user_guide/c_extensions.html",
     "development/testing": "tests/index.html",
-    "development_guide/contribute": "contributing/index.html",
-    "how_tos/custom_checkers": "../development_guide/how_tos/custom_checkers",
+    "development_guide/contribute": "../development_guide/contributor_guide/index.html",
+    "how_tos/custom_checkers": "../development_guide/how_tos/custom_checkers.html",
     "how_tos/index": "../development_guide/how_tos/index.html",
-    "how_tos/plugins.rst": "../development_guide/how_tos/plugins.html",
+    "how_tos/plugins": "../development_guide/how_tos/plugins.html",
     "how_tos/transform_plugins": "../development_guide/how_tos/transform_plugins.html",
     "technical_reference/checkers": "../development_guide/technical_reference/checkers.html",
     "technical_reference/index": "../development_guide/technical_reference/index.html",