Using `format` for formatting bang queries caused a KeyError for some
searches, such as !hd (HUDOC). In that example, the URL returned in the
bangs json was `http://...#{%22fulltext%22:[%22{}%22]...`, where
standard formatting would not work due to the misidentification of
"fulltext" as a formatting key.
The logic has been updated to just replace the first occurence of "{}"
in the URL returned by the bangs dict.
Fixes#513
DDG style bang searches can now have the bang (!) at the end of
the search (i.e. "bologna w!" will now redirect to wikipedia just like
"bologna !w" would)
The app/utils/*_utils weren't named very well, and all have been updated
to have more accurate names.
Function and class documention for the utils have been updated as well,
as part of the effort to improve overall documentation for the project.
Ben Busby
Vansh Comar
BlissOWL
Ben Busby