exposed function. (But note that this function is neither documented
nor declared in any installed header file, and it probably should not
be externally exposed.) Related to PR 44183, closes PR 44186.
skip entries, print (null), run off the end of the array, or occasionally
receive SIGSEGV, and now will, hopefully at least, do none of that.
Based in part on the patch in PR 44183 from Sergio Acereda; I also
did some tidyup and fixed it to print top-to-bottom first like ls(1).
Provide a layer of indirection between the readline compatibility functions
and our internal implementation, so that we have the freedom to change the
function signature.
The place to change the completion_append_character is
usually somewhere in the `rl_completion_entry_function'
callback which is where one usually can distinguish between
file- or dir-like entries to append a slash for dirs etc.
This does no longer work since `fn_complete()' takes the
`append_character' as argument before the callback is executed,
so that changes to the variable `rl_completion_append_character'
have in fact no effect for the current completion.
Fix by adding a function that returns the rl_completion_append_character,
when it gets passed in a filename in readline emulation.
Pass in loads of parameters instead of relying on shed-loads of global
variables to modify the behaviour.
The filename completion code can now be enabled by code that uses el_gets().
(eg /bin/sh)
