Makes all the suggestions on the completion menu have the same format:
{type}{suggestedWord}{extra description}
the type column is aligned to 6 characters wide (and aligned to the right),
to allow the suggestion to be easily visually detectable and, as a bonus,
the type too.
For example, a bit of menu would look like this:
fn stdout() -> Stdout
trait BufRead: Read
struct BufReader<R>
Type is one of the following:
- fn
- enum
- mod
- trait
- struct
It also trims the module extra bits to only 30 characters long (it can be a lot longer than that)
When AWK processes the racer response, it adds a trailing ':' that
kakoune completion expects to lead to a row having an 'a|b|c' shape,
but it's empty instead. Removing the extra ':' allows the racer
complation to actually work.
