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TextFile :: unindent - Unindent formatted text

The function allows reducing the indent level. The current indenting value is calculated from indentSize multiplied by indent level, which gives the number of spaces to be inserted as indent after line break.

In order to increase indent level, indent() may be called.

The function is supported for formatted text processing, only. Any other kind of text processing will cause an exception.

Implementation details

TextFile  :: unindent (  )

The function reduces the indent level by 1.