MetaObject: Apply some cosmetics

Add missing white space to moc output and list all the values of
QMetaObject::Call in the internal documentation.

Change-Id: I57d0c5b88bfaee4ca3f2d4604564751b6d0cbe51
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

src/corelib/kernel/qmetaobject.cpp

@@ -97,12 +97,16 @@ using namespace Qt::StringLiterals;
 
     \internal
 
-    \value InvokeSlot
-    \value EmitSignal
+    \value InvokeMetaMethod
     \value ReadProperty
     \value WriteProperty
     \value ResetProperty
     \value CreateInstance
+    \value IndexOfMethod
+    \value RegisterPropertyMetaType
+    \value RegisterMethodArgumentMetaType
+    \value BindableProperty
+    \value CustomCall
 */
 
 /*!

src/tools/moc/generator.cpp

@@ -1282,7 +1282,7 @@ void Generator::generateStaticMetacall()
             hasBindableProperties |= !p.bind.isEmpty();
         }
         if (needElse)
-            fprintf(out, "else ");
+            fprintf(out, " else ");
         fprintf(out, "if (_c == QMetaObject::ReadProperty) {\n");
 
         auto setupMemberAccess = [this]() {