Fix sausage-fingers in comment

eeschema/sch_symbol.cpp

@@ -1996,7 +1996,7 @@ void SCH_SYMBOL::MirrorHorizontally( int aCenter )
 
     for( SCH_FIELD& field : m_fields )
     {
-        // Move the fields to the new position because the sy:Qmbol itself has moved.
+        // Move the fields to the new position because the symbol itself has moved.
         VECTOR2I pos = field.GetTextPos();
         pos.x -= dx;
         field.SetTextPos( pos );