lib/sh/util.sh: command(): removed 2>&$err_fd, which is no longer needed because $err_fd is now 2 (in general, there is probably not a need for a special $err_fd var, because 2 is already stderr)

lib/sh/util.sh: command(): don't set err_fd to global stderr, because this prevents errors from being captured and parsed by callers. it is also not necessary to use a separate port than stderr, because stderr already contains only errors (since logging messages go to their own port). global stderr would still be useful e.g. for displaying input prompts the user when reading from global stdin.

bugfix: *run: overriding targets: use new self_make to properly progagate the $remake flag to the overridden target, so that the target itself is not skipped

lib/sh/util.sh: to_file(): added del= flag to prevent the file from being auto-removed on error (e.g. to preserve a partial result, which normally would be removed)

lib/sh/make.sh: added self_make(), which progagates the $remake flag (normally it is not progagated, because prerequisites should not also be remade)

lib/sh/util.sh: usage comments: when there is a descriptive comment on the same line as the usage, prepend it with # (as if it were an end-of-line comment) instead of enclosing it in (), to make it visually obvious that it's a comment and not part of the usage commands

lib/sh/util.sh: added all_funcs(), which lists all declared functions

bugfix: inputs/GBIF/raw_occurrence_record/run: table.tsv/make(): added check_target_exists so table.tsv would not be overwritten if it already existed

bugfix: inputs/GBIF/table.run: table.tsv/make(): force table.tsv.md5 to be remade (using remake=1) because the table.tsv contents will have changed

bugfix: lib/sh/make.sh: set_make_vars: can't use end-of-line comment in alias because it will comment out whatever is after the alias where it's used. can't just put a newline or ; after the end-of-line comment because the alias's lines will be combined onto one line using ; , so end-of-line comments would not be supported.