When debugging firefox bookmark javascript, I found myself always concatenate multiple line javascript code into one line.

Here is the shell script to redirect it to a local file, where the "notepad" kicks in and automatically load it.

js_merger.py bookmark.js  bookmark.txt  notepad bookmark.txt

And here is the code to automatically do this:

import sys
if len(sys.argv)!=2:
  print "Usage: js_merger.py {file.js}"
else:
  l = open(sys.argv[1]).readlines()
  print "javascript:(function(){" + ' '.join([i.strip() for i in l]) + "})();"