Add documentation for Slider

input.go

@@ -52,7 +52,7 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) {
 	word      := modifiers.Control
 	sel       := modifiers.Shift
 	changed   := false
-	
+
 	switch {
 	case key == input.KeyEnter:
 		this.on.enter.Broadcast()
@@ -87,7 +87,7 @@ func (this *TextInput) handleKeyDown (key input.Key, numpad bool) {
 		this.text, dot = text.Type(this.text, dot, rune(key))
 		changed = true
 	}
-	
+
 	this.Select(dot)
 	if changed { this.SetText(string(this.text)) }
 }