Add test for existing functionality
Explain organisation acronyms in search results
Rename variable for accuracy
Move code into a helper

It's less unpleasant this way, and we can lean on ERB for generating html,
rather than concatenating strings.
Refactor test
Don't show pointless abbreviations

Some organisations don't have an abbreviation (aka acronym). There's no point
pretending that these are abbreviations.
Merge pull request #388 from alphagov/explain_acronyms_in_search_results

Explain acronyms in search results (Mk2)