[PATCH 5 of 7] pycompat: switch to util.stringio for py3 compat

[Yuya Nishihara]

On Wed, 06 Apr 2016 16:57:42 -0500, timeless wrote:
> # HG changeset patch
> # User timeless <timeless at mozdev.org>
> # Date 1459974801 0
> #      Wed Apr 06 20:33:21 2016 +0000
> # Node ID d169dc85e6b39805caf94a212bcdb3d58593a97e
> # Parent  fe05b5e676098d90810e3dc87126e1451ccc1ccb
> pycompat: switch to util.stringio for py3 compat

> diff --git a/mercurial/pure/pycompat.py b/mercurial/pure/pycompat.py
> new file mode 120000
> --- /dev/null
> +++ b/mercurial/pure/pycompat.py
> @@ -0,0 +1,1 @@
> +../pycompat.py
> \ No newline at end of file

Symlink doesn't work on Windows. This should be dropped.