Also check if bat exists before aliasing cat.

.shell_aliases

@@ -22,7 +22,9 @@ function ww {
     ws $(rg --no-line-number --no-filename . ~/wiki | sed 's/[^a-zA-Z0-9]\+/\n/g' | grep -v "^$" | sort -f | uniq -ci | sort -hr | fzf -i | cut -c 9-)
 }
 
+if command -v bat; then
     alias cat="bat"
+fi
 export FZF_DEFAULT_COMMAND='fd --type f'
 alias fzf="fzf --preview 'bat --style=numbers --color=always {}'"