Considering that formatting only affects a single compilation unit, and
that code formatting does not support line ranges yet, remove dependency
on clang::tooling::Replacement.
This fixes SR-2619.
llvm::Error's destructor has an assert in it that it was checked for success or
failure. This patch puts in a quick check for failure and emits a message to
llvm::errs() and returns failure (which in this case is indicating by returning
true).
A first class diagnostic should be added here, but given that I am preparing for
a stable merge update on a quick time schedule, I did the easy thing (with
respect to the message).
If a line range is not set, create a line range over the unsigned type,
instead of setting an arbitrary limit. We're not probably going to ever
deal with such big files, though.
