fix fish errors

[peeviddy]

WHAT

fixed some bugs I and several others encountered after the latest update

• Apple M1 macOS Ventura 13.2.1, iTerm2 3.4.19, fish 3.6.1, fisher 4.4.3, tide 5.5.1

  WHY

  I was unable to cd without seeing errors 😵‍💫

~/.config/fish/functions/enhancd.fish (line 58): Missing end to balance this if statement
                if _enhancd_helper_is_default_flag "$argv[1]"
                ^^
from sourcing file ~/.config/fish/functions/enhancd.fish
    called on line 1 of file ~/.config/fish/conf.d/enhancd.fish
in function 'cd' with arguments '../'
source: Error while reading file '/Users/peeviddy/.config/fish/functions/enhancd.fish'
fish: Unknown command: enhancd
~/.config/fish/conf.d/enhancd.fish (line 3):
        enhancd $argv
        ^~~~~~^
in function 'cd' with arguments '../'

thanks to @martonperei for some of the lines I added in this PR