[clang] [llvm] [z/OS] treat text files as text files so auto-conversion is done (PR #90128)

[via cfe-commits]

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@@ -413,8 +413,9 @@ static bool format(StringRef FileName, bool ErrorOnIncompleteFormat = false) {
   // On Windows, overwriting a file with an open file mapping doesn't work,
   // so read the whole file into memory when formatting in-place.
   ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
-      !OutputXML && Inplace ? MemoryBuffer::getFileAsStream(FileName)
-                            : MemoryBuffer::getFileOrSTDIN(FileName);
+      !OutputXML && Inplace
+          ? MemoryBuffer::getFileAsStream(FileName)
+          : MemoryBuffer::getFileOrSTDIN(FileName, /*IsText=*/true);
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mydeveloperday wrote:

Yes I also was able to confirm there was no impact on windows i just wasn't sure so needed to prove it to myself, I'm ok if you want to commit this into clang-format, if you break stuff... we'll simply revert it ;-)

https://github.com/llvm/llvm-project/pull/90128