Have rbenv-uninstall respect `-h|--help`

bin/rbenv-uninstall

@@ -27,6 +27,10 @@ if [ -z "$RBENV_ROOT" ]; then
   RBENV_ROOT="${HOME}/.rbenv"
 fi
 
+if [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
+  usage 0
+fi
+
 unset FORCE
 if [ "$1" = "-f" ] || [ "$1" = "--force" ]; then
   FORCE=true

test/rbenv.bats

@@ -161,6 +161,13 @@ OUT
   assert_output_contains 'Usage: rbenv install'
 }
 
+@test "show help for rbenv-install" {
+  stub_ruby_build
+  run rbenv-install -h
+  assert_success
+  assert_output_contains 'Usage: rbenv install'
+}
+
 @test "not enough arguments rbenv-uninstall" {
   run rbenv-uninstall
   assert_failure
@@ -172,3 +179,9 @@ OUT
   assert_failure
   assert_output_contains 'Usage: rbenv uninstall'
 }
+
+@test "show help for rbenv-uninstall" {
+  run rbenv-uninstall -h
+  assert_success
+  assert_output_contains 'Usage: rbenv uninstall'
+}