run go modernizer

kittens/command_palette/main.go

@@ -142,8 +142,8 @@ func bestWordMatch(queryToken string, words []wordToken, colText string) (score
 
 	// Compound token: try exact substring match in the column text
 	colLower := strings.ToLower(colText)
-	if idx := strings.Index(colLower, queryToken); idx != -1 {
-		runeIdx := len([]rune(colLower[:idx]))
+	if before, _, ok := strings.Cut(colLower, queryToken); ok {
+		runeIdx := len([]rune(before))
 		qRuneLen := len([]rune(queryToken))
 		subParts := strings.FieldsFunc(queryToken, isWordDelimiter)
 		return 4 * len(subParts), runeRange(runeIdx, runeIdx+qRuneLen)

kittens/command_palette/main_test.go

@@ -23,8 +23,8 @@ func testBinding(key, action, help string) Binding {
 // Action. Action is derived as the first word of actionDisplay.
 func testMouseBinding(key, actionDisplay string) Binding {
 	action := actionDisplay
-	if idx := strings.IndexByte(actionDisplay, ' '); idx >= 0 {
-		action = actionDisplay[:idx]
+	if before, _, ok := strings.Cut(actionDisplay, " "); ok {
+		action = before
 	}
 	return Binding{
 		Key:           key,

tools/watch/api_test.go

@@ -245,7 +245,7 @@ func TestWatchForConfigChangesDebounce(t *testing.T) {
 	// Write to the file several times rapidly within the debounce window.
 	// The fswatcher debouncer drops events that occur within the cooldown period
 	// after the first event, so only the first write should produce an action call.
-	for i := 0; i < 5; i++ {
+	for i := range 5 {
 		write_file(t, main_conf, fmt.Sprintf("font_size %d\n", 12+i))
 		time.Sleep(20 * time.Millisecond)
 	}