This fixes regression introduced in https://github.com/llvm/llvm-project/commit/5e5efd8a91f2e340e79a73bedbc6ab66ad4a4281.
Before the culprit commit, macros in WhitespaceSensitiveMacros were correctly formatted even if their closing parenthesis weren't followed by semicolon (or, to be precise, when they were followed by a newline).
That commit changed the type of the macro token type from TT_UntouchableMacroFunc to TT_FunctionLikeOrFreestandingMacro.
Correct formatting (with WhitespaceSensitiveMacros = ['FOO']):
FOO(1 + 2) FOO(1+2);