fixed typo in option spec

Closes #457

get_iplayer

@@ -83,7 +83,7 @@ my $opt_format = {
 	# Recording
 	attempts	=> [ 1, "attempts=n", 'Recording', '--attempts <number>', "Number of attempts to make or resume a failed connection.  --attempts is applied per-stream. Programmes have multiple streams available for each recording quality."],
 	audioonly		=> [ 1, "audioonly|audio-only!", 'Recording', '--audio-only', "Only download audio stream for TV programme. Produces .m4a file. Implies --force."],
-	downloadabortonfail	=> [ 1, "downloadabortonfail|download-abort-onfail|download-abort-onfail!", 'Recording', '--download-abort-onfail', "Exit immediately if any stream fails to download. Use to avoid repeated failed download attempts if connection is dropped or access is blocked."],
+	downloadabortonfail	=> [ 1, "downloadabortonfail|download-abort-on-fail|download-abort-onfail!", 'Recording', '--download-abort-onfail', "Exit immediately if any stream fails to download. Use to avoid repeated failed download attempts if connection is dropped or access is blocked."],
 	excludeformat	=> [ 1, "excludeformat|exclude-format=s", 'Recording', '--exclude-format <format>,<format>,...', "Comma-separated list of media stream formats to ignore when recording. Valid values: hls,dash."],
 	excludesupplier	=> [ 1, "excludecdn|exclude-cdn|excludesupplier|exclude-supplier=s", 'Recording', '--exclude-supplier <supplier>,<supplier>,...', "Comma-separated list of media stream suppliers (CDNs) to skip. Possible values: akamai,limelight,bidi,cloudfront. Synonym: --exclude-cdn."],
 	force		=> [ 1, "force|force-download!", 'Recording', '--force', "Ignore programme history (unsets --hide option also)."],