I type it all out again.
I fix the spelling and punctuation.
I change the words and context as it suits me to support my argument, views and to portray the original author in the light in which I want them to be seen.
An example might be if, I dunno, Tobes said " I am not a Lib Dem", if it suited me I would type "Tobes is a Lib Dem". Which, of course, he isn't because he has never claimed credit for the Kingshill crossing.
I believe the practice is called 'journalism' or, in extreme cases, 'politics'.