Add nowrap, nocycle, nohidden for --preview-window

Close #2203

src/options_test.go

@@ -399,11 +399,11 @@ func TestPreviewOpts(t *testing.T) {
 	}
 	opts = optsFor("--preview-window=up:15:wrap:hidden:+{1}-/2", "--preview-window=down", "--preview-window=cycle")
 	if !(opts.Preview.command == "" &&
-		opts.Preview.hidden == false &&
+		opts.Preview.hidden == true &&
 		opts.Preview.wrap == true &&
 		opts.Preview.cycle == true &&
 		opts.Preview.position == posDown &&
-		opts.Preview.scroll == "" &&
+		opts.Preview.scroll == "{1}-/2" &&
 		opts.Preview.size.percent == false &&
 		opts.Preview.size.size == 15) {
 		t.Error(opts.Preview.size.size)