For readability, switch to tab indents; was using a mix of tab indents, 4-space indents, and ambiguous space+tab indents.  Added an XXX comment about a confusing part.  Still doesn't build on Windows.
For readability, switch to tab indents; was using a mix of tab indents,
4-space indents, and ambiguous space+tab indents.  Added an XXX comment
about a confusing part.  Still doesn't build on Windows.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator