TBufferFile: remove stray quote in error message

Remove extra single quote in error message to avoid confusion what the actual class name is.

Author: fwinkl

io/io/src/TBufferFile.cxx

@@ -2633,7 +2633,7 @@ TClass *TBufferFile::ReadClass(const TClass *clReq, UInt_t *objTag)
         !(clReq->GetSchemaRules() &&
           clReq->GetSchemaRules()->HasRuleWithSourceClass(cl->GetName()) )
         ) ) {
-      Error("ReadClass", "The on-file class is \"'%s\" which is not compatible with the requested class: \"%s\"",
+      Error("ReadClass", "The on-file class is \"%s\" which is not compatible with the requested class: \"%s\"",
             cl->GetName(), clReq->GetName());
       // exception
    }