git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239816 91177308-0d34-0410-b5e6-96231b3b80d8

insertions. It is unlikely to be the intention to delete parts of newly
inserted code. To do so, changed sorting Replacements at the same offset
to have decreasing length.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@239809 91177308-0d34-0410-b5e6-96231b3b80d8

first writing the changed files to a temporary location and then overwriting
the original files atomically.

Also adds a RewriterTestContext to aid unit testing rewrting logic in general.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157260 91177308-0d34-0410-b5e6-96231b3b80d8