When no repos are defined, the `repo` variable is undefined. Therefore
append it only to the result if a repo was found. Otherwise Ansible will
fail with an UnboundLocalError.
* Complie regular expressions for better performance
* Skip on empty lines
This fixes a bug where the previous repo would be inserted in the result twice since an empty line did not match any of the conditions that would exit the loop iteration.
Till Maas
Richlv
Sam Doran
Petr Ruzicka
Martin Krizek
Sam Doran
Giovanni Sciortino