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In addition to "-ovalue" and "--opt=value" syntax, allow also "-o value" and "--opt value" for options with optional argument when the newly added PARSE_OPT_OPTARG_ALLOW_NEXT flag is set. This behavior is turned off by default since it does not make sense for tools using non-option command line arguments. Consider the ambiguity of "cmd -d x", where "-d x" can mean either "-d with argument of x" or "-d without argument, followed by non-option argument x". This is not an issue in the case that the tool takes no non-option arguments. To implement this, a new local variable, force_defval, is created in get_value(), along with a comment explaining the logic. Link: https://lore.kernel.org/r/20260528103254.2990068-3-tglozar@redhat.com Signed-off-by: Tomas Glozar <tglozar@redhat.com>