Exclude generated files from code coverage

[iapicca]

fix #768

[osa1]

These files are generated by the plugin so if we want any changes on them the plugin should be generating the changes.

If you could give us some context in the issue (see my question) I can help with the implementation.

[iapicca]

These files are generated by the plugin so if we want any changes on them the plugin should be generating the changes.

sorry, I thought they were something like a template since they are in the repo, shouldn't the generated folder be in .gitignore if it's just for testing?

If you could give us some context in the issue (see my question) I can help with the implementation.

@osa1
I added the line // coverage:ignore-file to FileGenerator's _writeHeading's boilerplate
please let me know if there is any other action I should take
(after you vacations, no hurry :) )