<p>In <a href="https://github.com/geany/geany/pull/1017#discussion_r65192497">data/filedefs/filetypes.autoit</a>:</p>
<pre style='color:#555'>> +#settings for folding comment blocks and preprocessor lines
> +#lexer.au3.fold.comment=1
> +#lexer.au3.fold.compact=1
> +#lexer.au3.fold.preprocessor=0
> +
> +[settings]
> +# default extension used when saving files
> +extension=au3
> +
> +# MIME type
> +
> +# which characters should be skipped when moving (or included when deleting) to word boundaries
> +# should always include space and tab (\s\t)
> +#whitespace_chars=\s\t!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~
> +# the following characters are these which a "word" can contains, see documentation
> +wordchars=_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
</pre>
<p>Still, why are wordchars explicitly defined here?  Still looks like the default, and a very common value</p>

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