** matches one or more directories, not zero or more

The path pattern ** seems to require at least one explicit directory in the directory subpath that it matches. E.g., let's say we have

au bufread,bufnewfile ~/**/*.ex let b:starstar_check = 1

Now, editing a file ~/tmp/a.ex will, as expected, set its b:starstar_check to be set.

However, editing a file ~/b.ex does not set b:starstar_check.

Is this expected behavior, and if so, what is the preferred way to capture all the files (recursively) in a directory?

--d

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