path filetype

[jesse99]

All the get extension functions I can recall using include the dot in what they return (as did the previous rust function). Unless there's a really good reason I don't think this should have changed.

For what it's worth the three languages I checked all include the dot:
Python splitext function
http://docs.python.org/library/os.path.html

boost file system extension method
http://www.boost.org/doc/libs/1_51_0/libs/filesystem/doc/reference.html#path-extension

.NET GetExtension method
http://msdn.microsoft.com/en-us/library/system.io.path.getextension.aspx

[brson]

Precedent FTW. Sounds fine to me.