[QScintilla] Multiple textChanged signals when indenting a selection with multiple lines

[Chris Pezley]

Hi,

I've noticed the following issue(?) when using qscintilla: highlight 
multiple lines in the editor and press tab. The textChanged signal is 
emitted once for every line that is indented. Since pressing delete with 
multiple lines selected only emits one textChanged, I would assume that 
the multiple emits is an error.

I've included a small example to quickly test this. Just write a couple 
of lines, highlight them, press tab and then see the console output.

Best regards,
Chris
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