Don't know about the lnx package. And I didn't check your code.
But I can answer beginner's questions:
1. The plus sign means concatenation for strings.
var s = "text"
s += "\n"
2. fmt.Println prints to standard output, but fmt.Sprintln prints to a
string.
3. Similar answer: Use fmt.Sscanf.
Ahh ... and you might like the word 'button' better than 'bottom' :-)
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