Fix deprecation warning on the regex to check the transaction comment

Deprecation warning explained in the 2nd § of the re module.

• Use //

changed milestone to %0.9.0

added D: Transfer Easy pick labels

changed title from Fix deprecating warning on the regex to check the transaction comment to Fix deprecation warning on the regex to check the transaction comment

assigned to @moul

changed milestone to %0.8.0

mentioned in commit 7afd0e9f

mentioned in merge request !138 (merged)

closed via merge request !138 (merged)