Small improvement to ShellExample trac processor

[goozbach]

I'm loving your ShellExample preprocessor. I found it's shell syntax just a little lacking however

attached is the new version I've created(basicly just a tweak of the regex).

My new version allows for a more flexible prompt to be displayed such as

user@host $

or

root@host #

it also allows for windows cmd.exe style shell prompts as well:

C:\>

or

C:\Documents and Settings\username\> 

[goozbach]

improved ShellExample preprocessor

[moo]

good to know someone is interested in the small script i wrote. i'll check it

[goozbach]

found one bug, apparently it chokes on a redirect.

e.g.

foo@host # cat /etc/passwd >> foo.txt

it ends up hilighting all the way to the second redirector

[moo]

a modified ShellExample.py is uploaded in the wiki page