Don’t show duplicate names in parentheses

[colinrotherham]

I know the readme says that location-autocomplete-graph.json "only contains examples" but various entries have duplicated synonyms (in brackets) such as:

French Guiana (French Guiana) French Southern Territories (French Southern Territories) Sint Eustatius (Sint Eustatius)

This pull request hides them if the synonym exactly matches the canonical name.

Otherwise the results list shows the duplicates like this:

This is so we can use the list out of the box for prototypes.

[gidsg]

@colinrotherham thanks for flagging this and raising the PR. My feeling is that the correct way to fix this is to publish an updated version of the synonyms without these duplicates, so I will look into doing that in a separate PR.

[edwardhorsford]

Could we consider re-opening this? I agree it's better if the source data didn't include duplicates, but this feels like a nice safety net (possibly to apply to the autocomplete too) if things slip through.