BranchProb: Simplify printing code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207559 91177308-0d34-0410-b5e6-96231b3b80d8
SupportTest: Fix test names harder

r207552, r207553 and r207554 all had bad test names.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207560 91177308-0d34-0410-b5e6-96231b3b80d8