[llvm] [MC,ELF] Emit warning if a string constant contains newline char. (PR #98060)

[Dmitriy Chestnykh via llvm-commits]

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@@ -613,7 +613,7 @@ bool DarwinAsmParser::parseDirectiveLinkerOption(StringRef IDVal, SMLoc) {
       return TokError("expected string in '" + Twine(IDVal) + "' directive");
 
     std::string Data;
-    if (getParser().parseEscapedString(Data))
+    if (getParser().parseEscapedString(Data, false))
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chestnykh wrote:

I agree with you. Such a code with newlines in strange places most likely can only appear if it is written manually.
So i i think that prohibiting of newlines in all `parseEscapedString()` places is a good idea

https://github.com/llvm/llvm-project/pull/98060