chore(fish): prefer neovim for editor commands

.config/fish/config.fish

@@ -1,9 +1,16 @@
 starship init fish | source
 set fish_greeting ""
 
+# Prefer Neovim for both explicit and editor-variable invocations.
+alias vim nvim
+set -gx EDITOR nvim
+set -gx VISUAL nvim
+
 # pyenv setup
 while set pyenv_index (contains -i -- "/home/alex/.pyenv/shims" $PATH)
-set -eg PATH[$pyenv_index]; end; set -e pyenv_index
+    set -eg PATH[$pyenv_index]
+end
+set -e pyenv_index
 set -gx PATH '/home/alex/.pyenv/shims' $PATH
 set -gx PYENV_SHELL fish
 command pyenv rehash 2>/dev/null
@@ -19,8 +26,6 @@ function pyenv
     end
 end
 
-
-
 # bun
 set --export BUN_INSTALL "$HOME/.bun"
 set --export PATH $BUN_INSTALL/bin $PATH