GitLab

Fix build (less.rs)

Basic implementation of less.

join -> concat, write->writeln, make errors consistent

Fix typo in grep.rs

Calc: Enable Exponentiation

It seems the code was commented because the code wasn't working, but after uncommenting the code and it's test, the test succeeds and the output works fine, so there's no need to disable the feature.

Update grep.rs

correcting manpage

Add WIP calc.

Add the grep command