[TxMt] Markdown problem

[Michael Gregoire]

When trying to use the "Level 1 [setext]" or "Level 2 [setext]"  
bundle commands I get the following output

Unknown option: n
Unknown option: 1
Usage: head [-options] <url>...
     -m <method>   use method for the request (default is 'HEAD')
     -f            make request even if head believes method is illegal
     -b <base>     Use the specified URL as base
     -t <timeout>  Set timeout value
     -i <time>     Set the If-Modified-Since header on the request
     -c <conttype> use this content-type for POST, PUT, CHECKIN
     -a            Use text mode for content I/O
     -p <proxyurl> use this as a proxy
     -P            don't load proxy settings from environment
     -H <header>   send this HTTP header (you can specify several)

     -u            Display method and URL before any response
     -U            Display request headers (implies -u)
     -s            Display response status code
     -S            Display response status chain
     -e            Display response headers
     -d            Do not display content
     -o <format>   Process HTML content in various ways

     -v            Show program version
     -h            Print this message

     -x            Extra debugging output

Here's the actual command for Level 1:


#!/bin/sh

if [[ $TM_LINE_INDEX == 0 && $TM_LINE_NUMBER != 1 ]]
    then head -n$((TM_LINE_NUMBER-1))|tail -n1|sed 's/./=/g'
    else echo -ne '=\t'
fi

I'm running TextMate Version 1.5.4 (1324) and have checked out the  
latest bundles and support.

Any idea why this is happening?

Thanks
Mike Gregoire