[gardening] Fix file header formatting.

Author: practicalswift

include/swift/Runtime/Portability.h

@@ -1,4 +1,4 @@
-//===--- Portability.h -----------------------------------------*- C++ -*-===//
+//===--- Portability.h ------------------------------------------*- C++ -*-===//
 //
 // This source file is part of the Swift.org open source project
 //
@@ -20,4 +20,4 @@
 
 size_t _swift_strlcpy(char *dst, const char *src, size_t maxlen);
 
-#endif
+#endif

stdlib/private/SwiftPrivateLibcExtras/Subprocess.c

@@ -1,4 +1,4 @@
-//===--- Subprocess.cpp - Subprocess Stubs --------------------------------===//
+//===--- Subprocess.c - Subprocess Stubs ----------------------------------===//
 //
 // This source file is part of the Swift.org open source project
 //

stdlib/public/runtime/Portability.cpp

@@ -1,4 +1,4 @@
-//===--- Portability.cpp - -----------------------------------------------===//
+//===--- Portability.cpp - ------------------------------------------------===//
 //
 // This source file is part of the Swift.org open source project
 //
@@ -8,11 +8,11 @@
 // See http://swift.org/LICENSE.txt for license information
 // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
-//===---------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Implementations of the stub APIs that make portable runtime easier to write.
 //
-//===---------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
 
 #include "swift/Runtime/Portability.h"
 #include <cstring>