[RFC]vim-patch:7.4.295

Problem:    Various typos, bad white space and unclear comments.
Solution:   Fix typos.  Improve white space. Update comments.

https://code.google.com/p/vim/source/detail?r=662ae48e7e246a63d38c9f3165b15b62252edaee

Several questions/comments with this one.
1. gui_gtk_x11.c doesn't seem to be present in Neovim, so that change is not in the pull request.
2. screen.c is an indentation change. I assume that you all are fine with how uncrustify left it, so I excluded that change for now.
3. structs.h and the line of changed code in particular do not seem to be present in Neovim, so that change is also not in this pull request.
4. I know that the test files are deprecated and that we shouldn't change the input files, but since it's included in upstream, I included that change as well. I can remove that if you all want though.