fix(filepattern): the pattern only matches filenames, not full paths

[Tieske]

Some underlying methods, traversing files in directories and/or recursive functions suffer from the same problem.

[Tieske]

this function;

local function filemask(mask)
    mask = utils.escape(path.normcase(mask))
    return '^'..mask:gsub('%%%*','.*'):gsub('%%%?','.')..'$'
end

creates the pattern for matching. It has a start-anchor so the old code would only match if the pattern included "*".

eg. "*.lua would match "/some/path/myfile.lua".
But "my*.lua" would not match "/some/path/myfile.lua".

so instead of using ".*" and "." as patterns, we should probably change to "[^/\\]*" and "[^/\\]" .

See https://en.wikipedia.org/wiki/Glob_(programming), which explicitly names fnmatch as the common interface, so that clearly gives the intent of the function.

[Tieske]

looking at python; https://docs.python.org/3/library/fnmatch.html it mentions "Note that the filename separator ('/' on Unix) is not special to this module."

Which seems consistent with the existing implementation, yet makes for a bad user experience imho.