Wrong URL extraction for multi-line strings inside PO files

[stefan6419846]

Description

Extracting PO header values spread across multiple lines does not work and only considers the individual lines.

How To Reproduce

Run URL analysis on https://github.com/django/django/blob/97c05a64ca87253e9789ebaab4b6d20a1b2370cf/django/contrib/admin/locale/en_GB/LC_MESSAGES/django.po

This will report http://www.transifex.com/django/ as the URL instead of the full one, which would be http://www.transifex.com/django/django/language/en_GB/.

System configuration

• What OS are you running on? Linux
• What version of scancode-toolkit was used to generate the scan file? 32.2.1
• What installation method was used to install/run scancode? (pip/source download/other) pip

[AyanSinhaMahapatra]

Thanks @stefan6419846 for the report, this is a bug indeed and should be fixed!

We could likely do something specific for po files, but it could be interesting to look at more examples like this in different kind of files and stitch together URLs from multiple lines based on some patterns/heuristics (like if there are multiple / on the next lines)