Add grep command for TODOs

[jibran]

Add grep command to pre commit script to make sure there is no @todo left for this issue so when https://www.drupal.org/node/2577827 is fixed grep -inr 2577827 core/ should return nothing.

[alexpott]

This is problematic because there are valid @todo in our code. So checking this would cause a fail. I think a better thing would be to add a @todo checker to coder that checks the format and ensures it has a link to a drupal.org issue.

[jibran]

This is problematic because there are valid @todo in our code.

How can be a @todo valid if it is related to the same issue which is going to be committed? Either we need a fix for that or a new issue.

I think a better thing would be to add a @todo checker to coder that checks the format and ensures it has a link to a drupal.org issue.

Coder already checks the format but not all the @todo can be fixed on drupal.org sometimes it links to upstream library and sometimes it links to a PHP issue.