[libc-commits] [clang] [clang-tools-extra] [compiler-rt] [flang] [libc] [libcxx] [llvm] [mlir] [polly] ✏️ Fix "is is" typos (PR #206288)

[Jessica Clarke via libc-commits]

https://github.com/jrtc27 edited https://github.com/llvm/llvm-project/pull/206288