Merge pull request #19304 from compnerd/what-is-a-mark

diff --git a/lib/Sema/TypeCheckDeclObjC.cpp b/lib/Sema/TypeCheckDeclObjC.cpp
index 967e4c8..41c97e1 100644
--- a/lib/Sema/TypeCheckDeclObjC.cpp
+++ b/lib/Sema/TypeCheckDeclObjC.cpp
@@ -965,7 +965,7 @@
   }
 }
 
-#pragma mark @objc declaration handling
+#pragma mark "@objc declaration handling"
 
 /// Whether this declaration is a member of a class extension marked @objc.
 static bool isMemberOfObjCClassExtension(const ValueDecl *VD) {