Now that numbered types have their number printed, it's no longer

Now that numbered types have their number printed, it's no longer
interesting to print the number in a comment. Numbered instructions
don't need their number in a comment either.

Also, tidy up newline printing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78865 91177308-0d34-0410-b5e6-96231b3b80d8