Function completion descriptions are overly wordy

[zx8]

Consider the following scenario where I want to find a function I've defined that I know begins with __fish and has git somewhere in the name:

$ __fish_<tab>
# ctrl-s
# type "git"

Actual

None of these results are what I expect, because the description is being searched, which can contain all sorts of information that is irrelevant to the command I'm trying to recall.

Expected

Just commands that contain the exact substring "git".

[faho]

No it should search the descriptions. That allows you to find more stuff, and is super helpful e.g. to find a git commit.

In this case the descriptions are overzealous - the entire definition helps nobody.