Fix strict mode function error message

src/messages.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 424 matching lines @@
   T(SingleFunctionLiteral, "Single function literal required")                 \
   T(SloppyLexical,                                                             \
     "Block-scoped declarations (let, const, function, class) not yet "         \
     "supported outside strict mode")                                           \
   T(SpeciesNotConstructor,                                                     \
     "object.constructor[Symbol.species] is not a constructor")                 \
   T(StrictDelete, "Delete of an unqualified identifier in strict mode.")       \
   T(StrictEvalArguments, "Unexpected eval or arguments in strict mode")        \
   T(StrictFunction,                                                            \
     "In strict mode code, functions can only be declared at top level or "     \
-    "immediately within another function.")                                    \
+    "inside a block.")                                                         \
   T(StrictOctalLiteral, "Octal literals are not allowed in strict mode.")      \
   T(StrictWith, "Strict mode code may not include a with statement")           \
   T(StrongArguments,                                                           \
     "In strong mode, 'arguments' is deprecated, use '...args' instead")        \
   T(StrongConstructorDirective,                                                \
     "\"use strong\" directive is disallowed in class constructor body")        \
   T(StrongConstructorReturnMisplaced,                                          \
     "In strong mode, returning from a constructor before its super "           \
     "constructor invocation or all assignments to 'this' is deprecated")       \
   T(StrongConstructorReturnValue,                                              \
@@ skipping 108 matching lines @@
   static Handle<String> GetMessage(Isolate* isolate, Handle<Object> data);
   static base::SmartArrayPointer<char> GetLocalizedMessage(Isolate* isolate,
                                                            Handle<Object> data);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_