zsh: split off functions now contain a note about use

.config/shell/functions/todo

@@ -1,4 +1,5 @@
 #!/bin/bash
+# Source this and then run `todo`
 
 # a simple way to manage your todo list
 # Usage:
@@ -9,12 +10,13 @@
 # Suggested use: make a git repo for holding your todo list, then make
 # a symlink called 'todo' that points to your todo list in your home directory
 #
+
 todo() {
    todo_dir="$(dirname "$(realpath ~/todo)")"
    todo_file="$(realpath ~/todo)"
    if [ -z "$*" ];then
       ( # subshell to protect against directory changes
-      cd "$todo_dir" || exit
+      cd "$todo_dir" || return
 
       # pull the latest commits
       git rev-parse &&
@@ -31,7 +33,7 @@ todo() {
       )
 
    elif [ "$*" = "cd" ]; then
-      cd "$todo_dir" || exit
+      cd "$todo_dir" || return
    else
       git -C "$todo_dir" $@
    fi