Low level functionality to format numbers were embedded in the
implementation of raw_ostream. I have need to use these through
an interface other than the overloaded stream operators, so they
need to be raised to a level that they can be used from either
raw_ostream operators or other code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283921 91177308-0d34-0410-b5e6-96231b3b80d8
