A newspaper editor once intended to wordsmith a Winston Churchill statement. Churchill's statement to the press, however, ended with the preposition, "with." When the editor (correctly) pointed out that grammatically correct sentences should not end with a preposition, Churchill reputedly replied that, "This is the sort of English up with which I cannot put."
His intent was to retort with a proper, sufficiently obnoxious, response to demonstrate the absurdity of proper English, in contrast to the pragmatic, colloquial compromises of everyday English.
The trouble is, Churchill's example of obnoxiously correct English failed because it also ended with the preposition, "put" !
The obnoxious, grammatically correct, alternatives should have been:
"This is something to put, with which up, I cannot."; or
"This is something with which to put-up, I cannot."; or
"This is something, up, with which to put, I cannot."; or
"This is something with which up to put, I cannot."
Apologies. This author is simply clarifying a common malaprop of which, up, to put, one should not.