Factored out generation of custom action scripts.

- Reduced duplication via common make_action() function.
- ENH: Adding proper shebang line to the custom action scripts.
- Changed output of custom action to better differentiate from todo.sh output.

tests/t8000-actions.sh

@@ -8,10 +8,22 @@ This test covers the contract between todo.sh and custom actions.
 
 unset TODO_ACTIONS_DIR
 mkdir .todo.actions.d
-cat > .todo.actions.d/foo << EOF
-echo "TODO: foo"
+make_action()
+{
+	cat > ".todo.actions.d/$1" <<- EOF
+	#!/bin/bash
+	echo "custom action $1"
+EOF
+chmod +x ".todo.actions.d/$1"
+}
+
+make_action "foo"
+test_todo_session 'executable action' <<EOF
+>>> todo.sh foo
+custom action foo
 EOF
 
+chmod -x .todo.actions.d/foo
 test_todo_session 'nonexecutable action' <<EOF
 >>> todo.sh foo
 Usage: todo.sh [-fhpantvV] [-d todo_config] action [task_number] [task_description]
@@ -19,33 +31,21 @@ Try 'todo.sh -h' for more information.
 === 1
 EOF
 
-chmod +x .todo.actions.d/foo
-test_todo_session 'executable action' <<EOF
->>> todo.sh foo
-TODO: foo
-EOF
-
-cat > .todo.actions.d/ls << EOF
-echo "TODO: my ls"
-EOF
-chmod +x .todo.actions.d/ls
+make_action "ls"
 test_todo_session 'overriding built-in action' <<EOF
 >>> todo.sh ls
-TODO: my ls
+custom action ls
 
 >>> todo.sh command ls
 --
 TODO: 0 of 0 tasks shown
 EOF
 
-cat > .todo.actions.d/bad << EOF
-echo "TODO: bad"
-exit 42
-EOF
-chmod +x .todo.actions.d/bad
+make_action "bad"
+echo "exit 42" >> .todo.actions.d/bad
 test_todo_session 'failing action' <<EOF
 >>> todo.sh bad
-TODO: bad
+custom action bad
 === 42
 EOF