improve show-description results

Daniel Sangorrin

I had this in the backlog for a long time. These
patches, improve the way CVEs' descriptions are displayed
when calling scripts/ with the option
--show-description` enabled.

[1/3] report_affected: word-wrap for the 'description'
[2/3] report_affected: Delete extra blank lines
[3/3] issues: fill in the description field of


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