Fix bad formatting of overloaded operator definitions.

Fix bad formatting of overloaded operator definitions.

Before:
bool operator<
    (const aaaaaaaaaaaaaaaaaaaaa &left, const aaaaaaaaaaaaaaaaaaaaa &right) {
  return left.group < right.group;
}

After:
bool operator<(const aaaaaaaaaaaaaaaaaaaaa &left,
               const aaaaaaaaaaaaaaaaaaaaa &right) {
  return left.group < right.group;
}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178887 91177308-0d34-0410-b5e6-96231b3b80d8