[clang-tidy] Kill marco. No functionality change.

llvm-svn: 324084
diff --git a/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp b/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
index 1efcec9..ab6077a 100644
--- a/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
+++ b/clang-tools-extra/clang-tidy/utils/ASTUtils.cpp
@@ -49,7 +49,7 @@
         !SM.isMacroArgExpansion(Flags->getLocStart()))
       return false;
 
-    // Get the marco name.
+    // Get the macro name.
     auto MacroName = Lexer::getSourceText(
         CharSourceRange::getTokenRange(Flags->getSourceRange()), SM, LangOpts);