“Trouser crease’s are a mark of attention to appearance either by the man, his wife or his servant.”
WADR, while I have no problem with the gist of your reply, you made an all-too-common mistake in punctuation; e.g., “trouser crease’s.” instead of trouser creases.
By using an apostrophe you did not create the plural of crease; you created SINGULAR POSSESSIVE of crease. Which automatically triggers in the reader’s mind: Trouser crease’s what? Trouser crease’s sharpness? Or trouser crease’s length? Understand? In most cases, a plural can be created from a SINGULAR simply by adding the letter S. But NEVER by adding an apostrophe WITH the S. That creates NOT A PLURAL, but a SINGULAR POSSESSIVE. No charge for the foregoing info. ;oD
However, had you noted that the term "crease's" was in the italicized portion of my posting -- denoting that it was quoted from skr's original post -- you might have more correctly addressed the correction to skr.
My error, if any, would have been to omit [sic] immediately after the incorrect form, to clearly mark for the reader a recognized error which was retained in order to remain true to the original flavor of the quoted material.
Not that my posts are perfect -- I quite commonly have a 'doh!' moment right after I've hit the "Post" button, or I have to execute a "headslap reset" right after I read material I have posted.
But in this case, I would have to forward the charges. ;{)