Redmine issues are sometimes referenced with '#' and sometimes without
Example on https://0xacab.org/intrigeri/redmine-import-1/issues/17227:
- Without: Original created by @sajolida on 17227 (Redmine)
- With: Blocks #16711
Example on https://0xacab.org/intrigeri/redmine-import-1/issues/17227: