Fish 4.x ships the native `help` function embedded in the binary
(embedded:functions/help.fish) with no on-disk file. The old
functions/help.fish tried to `source $__fish_data_dir/functions/help.fish`
to back up the native help before shadowing it — that path no longer exists,
so the first `help config ...` call errored:
source: No such file or directory
functions: Function 'help' does not exist
The backup cannot happen from functions/help.fish at all: an autoload shadow
of that name makes `help` resolve to our own wrapper (or nothing, mid-load),
so `functions -c help` can never capture the embedded original.
Move the wrapper to conf.d/help.fish, sourced at startup before any shadow
exists, where `functions -c help __original_help` copies the embedded native
help. Behavior is otherwise unchanged: 'help config' delegates to config-help,
all other topics fall through to __original_help, and the C1 opinionated guard
still applies. Delete the obsolete functions/help.fish.
rootiest
