[PATCH V5] templater: introduce indent function

[Yuya Nishihara]

On Fri, 5 Jun 2015 17:16:08 -0700, Ryan McElroy wrote:
> # HG changeset patch
> # User Ryan McElroy <rmcelroy at fb.com>
> # Date 1428134632 25200
> #      Sat Apr 04 01:03:52 2015 -0700
> # Node ID 8e77e317b0c651b9cbd9bee054f9b9a7d6912c1e
> # Parent  c39640d26a4c7546faef00b9e5c02af45ab8bf5e
> templater: introduce indent function
> 
> diff --git a/mercurial/templater.py b/mercurial/templater.py
> --- a/mercurial/templater.py
> +++ b/mercurial/templater.py
> @@ -327,6 +327,30 @@ def pad(context, mapping, args):
>      else:
>          return text.ljust(width, fillchar)
>  
> +def indent(context, mapping, args):
> +    """
> +    :indent(text, indentchars, firstline): Indents all non-empty lines
> +    with the characters given in the indentchars string. An optional
> +    third parameter will override the indent for the first line only
> +    if present.
> +
> +    Example: indent('hello\\n\\nworld', '  ', '> ') == "> hello\\n\\n  world"
> +    """
> +    if 2 > len(args) > 3:
> +        # i18n: "indent" is a keyword
> +        raise error.ParseError(_("indent() expects two or three arguments"))

It will never be True, should be "not (2 <= len(args) <= 3)".

https://docs.python.org/2/reference/expressions.html#not-in