Make Core internals doc path coherent with Python module path

Author: popescu-v

doc/clean-doc

@@ -74,7 +74,7 @@ parse_commandline "$@"
 
 rm -v core/generated/*.rst
 rm -v sklearn/generated/*.rst
-rm -v internal/generated/*.rst
+rm -v internals/generated/*.rst
 rm -v tools/generated/*.rst
 sphinx-build -M clean . _build
 

doc/index.rst

@@ -39,7 +39,7 @@ files (``.kdic``).
   sklearn <sklearn/index>
   core <core/index>
   tools <tools/index>
-  internals <internal/index>
+  internals <internals/index>
 
 .. toctree::
   :caption: Tutorials and Code Samples