Problem: PyPA manifest files are not recognized.
Solution: Add a pattern to match PyPA manifest files.
" Protocols
au BufNewFile,BufRead */etc/protocols setf protocols
+" PyPA manifest files
+au BufNewFile,BufRead MANIFEST.in setf pymanifest
+
" Pyret
au BufNewFile,BufRead *.arr setf pyret
psl: ['file.psl'],
pug: ['file.pug'],
puppet: ['file.pp'],
+ pymanifest: ['MANIFEST.in'],
pyret: ['file.arr'],
pyrex: ['file.pyx', 'file.pxd'],
python: ['file.py', 'file.pyw', '.pythonstartup', '.pythonrc', 'file.ptl', 'file.pyi', 'SConstruct'],