Re: [GSoC PATCH 1/2] userdiff: add builtin driver for gitconfig syntax

> From Documentation/config.adoc:
> 
> """
> The file consists of sections and variables. A section begins with
> the name of the section in square brackets and continues until the next
> section begins. Section names are case-insensitive. Only alphanumeric
> characters, `-` and `.` are allowed in section names. Each variable
> must belong to some section, which means that there must be a section
> header before the first setting of a variable.
> 
> [...]
> 
> Subsection names are case sensitive and can contain any characters except
> newline and the null byte.
> 
> The variable names are case-insensitive, allow only alphanumeric characters
> and `-`, and must start with an alphabetic character.
> """

> Then, add a new builtin driver for gitconfig files, where:
> 
> - the funcname regular expression matches sections and subsections,
>   i. e. the pattern [SECTION] or [SECTION "SUBSECTION"], where the
>   section is composed by alphanumeric numbers, `-` and `.`, and
>   subsection names may be composed by any characters;