Shell-session: Fixed command false positives

[RunDevelopment]

This fixes #3047.

Changes:

• A space is now required after the shell symbol.
• Path-only user infos have to start with a special character to more precisely identify paths. (I split up the regex, so I could comment on the change.)

[github-actions]

JS File Size Changes (gzipped)

A total of 1 files have changed, with a combined diff of +31 B (+6.3%).

file	master	pull	size diff	% diff
components/prism-shell-session.min.js	495 B	526 B	+31 B	+6.3%

Generated by 🚫 dangerJS against 5715400

[sunknudsen]

@RunDevelopment Mind blown by how fast you handle issue. Thanks!

[sunknudsen]

Hey @RunDevelopment, just stumbled upon another edge case.

Not sure why < /dev/random | head -c 8 is not part of command.

[RunDevelopment]

Thanks for reporting @sunknudsen!

[sunknudsen]

Thanks so much for improving shell session support… very useful when writing guides. 🤓