This fixes llvm.org/pr14686.

We used to add too many spaces for different versions of overloaded operator
function declarations/definitions. This patch changes, e.g.

  operator *() {}
  operator >() {}
  operator () () {}

to

  operator*() {}
  operator>() {}
  operator()() {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171028 91177308-0d34-0410-b5e6-96231b3b80d8