How do you dynamically reload fish config files as you would in bash?
Solution 1:
Use
source ~/.config/fish/config.fish
Or, if your fish is older than 2.1 (See fish#310)
. ~/.config/fish/config.fish
Then it will be sourced again, so depending on what you have in there it will be reloaded. For example appending to a universal variable would add more entries.