Re: [RFC/PATCH] headers: normalize the spelling of some header guards

> 
> Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com>
> ---
> 
> Hi Junio,
> 
> This patch is marked RFC because I am not aware of any policy with
> regard to header guard spelling. Having said that, apart from the
> fetch-negotiator.h header, all of these headers are using a reserved
> identifier (see C99 Standard 7.1.3).
> 
> These headers were found, thus:
> 
>   $ git grep -n -E '^#ifn?def ' -- '*.h' | grep 'h\:1\:' | grep -v '^compat' | grep -v -E '[A-Z_]*_H$'
>   alias.h:1:#ifndef __ALIAS_H__
>   commit-reach.h:1:#ifndef __COMMIT_REACH_H__
>   fetch-negotiator.h:1:#ifndef FETCH_NEGOTIATOR
>   midx.h:1:#ifndef __MIDX_H__
>   t/helper/test-tool.h:1:#ifndef __TEST_TOOL_H__
>   vcs-svn/fast_export.h:1:#ifndef FAST_EXPORT_H_
>   vcs-svn/line_buffer.h:1:#ifndef LINE_BUFFER_H_
>   vcs-svn/sliding_window.h:1:#ifndef SLIDING_WINDOW_H_
>   vcs-svn/svndiff.h:1:#ifndef SVNDIFF_H_
>   vcs-svn/svndump.h:1:#ifndef SVNDUMP_H_
>