[diffoscope] [PATCH] Implement ElfFile as a container of sections

[Jérémy Bobbio]

Dhole:
> This works perfectly :) I've implemented it in the revision I'm attaching.
> 
> Let me know what you think.

Commited. Many thanks! This fixes Debian #808197.

I just made a tiny change:

> +class ElfContainer(Container):
> +    _sec_types = {'X': ElfCodeSection, 'S': ElfStringSection, '_': ElfSection}
       ^^^^^^^^^^

This is a constant, so I've renamed this to `SECTION_TYPES`.

> +                type = [self._sec_types[type] for type in flag if \
> +                        type in self._sec_types][0]

Even if it works, I think using `self` here is misleading as we are
using a class constant. I've replaced it with `ElfContainer`.

-- 
Lunar                                .''`. 
lunar at debian.org                    : :Ⓐ  :  # apt-get install anarchism
                                    `. `'` 
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