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PostgreSQL documentation
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You can specify an optional second argument, if it is provided it
may be either <literal>on</literal> or <literal>off</literal>
which will enable or disable display of a locale-aware character
- to seperate groups of digits to the left of the decimal marker. If
+ to separate groups of digits to the left of the decimal marker. If
the second argument is not provided then we will toggle between
on and off.
</para>