Correct inaccurate statement in FileCheck docs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186290 91177308-0d34-0410-b5e6-96231b3b80d8
Use conventional syntax for branches.
Patch by Job!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186291 91177308-0d34-0410-b5e6-96231b3b80d8