Re: [PATCH 1/3] t3700: note a .gitignore matching fault

> .gitignore support both positive and negative patterns. One may negate
> the other. Current code works well if both patterns target files in
> the same directory.
> 
> When a pattern targets a directory and an opposite pattern targets
> some files/directories within that directory, we need to descend in
> the directory until we're clear which ones are matched and which are
> not.
> 
> excluded_from_list() fails to handle this case. It too eagerly decides
> the fate of the whole directory without looking further in.