[issue13857] Add textwrap.indent() as counterpart to textwrap.dedent()

[Nick Coghlan]

Nick Coghlan <ncoghlan at gmail.com> added the comment:

I'd actually suggest that as the default behaviour (and is a good argument in favour of a dedicated function in textwrap - both suggested alternatives will blithely add whitespace to otherwise empty lines).

To handle the empty line requires either switching to an re.sub() based solution or adding a conditional expression:
    '\n'.join(((4 * ' ') + x if x else x) for x in s.splitlines())

I should probably also explicitly address the "why not textwrap.fill()?" alternative: because fill() does a lot more than simple indenting.

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<http://bugs.python.org/issue13857>
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