pure functions infer scope, but not return 5

Author: WalterBright

src/core/internal/utf.d

@@ -692,7 +692,7 @@ string toUTF8(const scope dchar[] s)
 /* =================== Conversion to UTF16 ======================= */
 
 @safe pure nothrow @nogc
-wchar[] toUTF16(wchar[] buf, dchar c)
+wchar[] toUTF16(return wchar[] buf, dchar c)
     in
     {
         assert(isValidDchar(c));

src/rt/aaA.d

@@ -854,7 +854,7 @@ struct Range
 
 extern (C) pure nothrow @nogc @safe
 {
-    Range _aaRange(AA aa)
+    Range _aaRange(return AA aa)
     {
         if (!aa)
             return Range();

src/rt/monitor_.d

@@ -233,7 +233,7 @@ struct Monitor
 
 private:
 
-@property ref shared(Monitor*) monitor(Object h) pure nothrow @nogc
+@property ref shared(Monitor*) monitor(return Object h) pure nothrow @nogc
 {
     return *cast(shared Monitor**)&h.__monitor;
 }