* fixed a bug of not setting the IGNORECASE option properly to TRE.

* added code to treat a regular expressio delimiter as a normal character when present within [] of a regular expression.
* changed code to allow 0 as a starting address of a start~step address form.
* added code to accept 'I' as a option to the 's' command.

qse/cmd/sed/sed.c

@@ -217,7 +217,6 @@ static int handle_args (int argc, qse_char_t* argv[])
 		}
 	}
 
-
 	if (opt.ind < argc && g_script_file == QSE_NULL) 
 		g_script = argv[opt.ind++];
 	if (opt.ind < argc) g_infile = argv[opt.ind++];