Same flag -f for both --forward-only and --colored-query-output-format options in queries

[fingels]

According to the README, the same flag -f is used for both the --forward-only and the --colored-query-output-format options for queries.

I noticed the problem when trying to use the colored query with -f JsonLinesWithNames (as indicated in the README) but it tried to operate the forward only option instead.

[Guilucand]

Hi @fingels,
there was an error in the readme, as the flag -f is actually mapped only for the --forward-only flag.
I fixed the issue in the documentation.

Best,
Andrea