Improve identification of c-style casts.

A ")" before any of "=", "{" or ";" won't be a cast. This fixes issues
with the formatting of unnamed parameters.

Before: void f(int *){}
After:  void f(int *) {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172349 91177308-0d34-0410-b5e6-96231b3b80d8
Don't put spaces around hyphens in include paths.

Before: #include <a - a>
After:  #include <a-a>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172350 91177308-0d34-0410-b5e6-96231b3b80d8
Always put a space after ",".

I am not aware of a case where that would be wrong. The specific case I
am fixing are function parameters wrapped in parenthesis (e.g. in
macros).

Before: function(a,(b));
After:  function(a, (b));

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172351 91177308-0d34-0410-b5e6-96231b3b80d8