[llvm] [llvm-lit] Support curly brace syntax in lit internal shell (PR #102830)

[Paul Kirth via llvm-commits]

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@@ -157,7 +157,11 @@ def lex_one_token(self):
         lex_one_token - Lex a single 'sh' token."""
 
         c = self.eat()
+        if c == "{" or c == "}":
+            return (c,)
         if c == ";":
+            if self.maybe_eat("}") or (self.maybe_eat(" ") and self.maybe_eat("}")):
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ilovepi wrote:

Can we get a comment here about what's going on?

https://github.com/llvm/llvm-project/pull/102830