gitweb: handle "patch" query parameter in filelog view As for paper style, in f36dc643ffdc, we display "diff" data as an additional row in the table of revision entries for the gitweb template. Also, as these additional diff rows have a white background, they may be confused with log entry rows ("age", "author", "description", "links") of even parity (parity0 also have a white background). So we disable parity colors for log entry rows when diff is displayed and fix the color to the "dark" parity (i.e. parity1 #f6f6f0) so that it's always distinguishable from