Supports for single quotes in personal title

[Joxit]

Background

In the French grammar, there are 8 article le, la, les, un, une, du, de, la. When an article like le or de is used with a noun which starts with a vowel, the article's vowel is replaced by a simple quote. For example, we don't write Le Amiral but L'Amiral.

So what ?

This PR fixes these edge cases which are common.
I think this should be spread in some other classifiers (such as GivenNameClassifier)

[missinglink]

Couple questions:

• Is the single-quote always in the second position or is that not always true?
• Is it possible to generate these synonyms at index-time rather than query-time? What difference would that make to performance and memory usage?

Note: you can use the 'backtick' in JS to avoid having to escape single quotes

[Joxit]

• Is the single-quote always in the second position or is that not always true?

With articles, the single-quote is always in the second position.

• Is it possible to generate these synonyms at index-time rather than query-time? What difference would that make to performance and memory usage?

Oh! Yes, it's totally possible to generate synonyms at index time. For French personal titles from libpostal, there is only amiral which need to be generated => small CPU and memory footprint. That means I can add this directly here : resources/pelias/dictionaries/libpostal/fr/. In addition to this one, I could add missing titles like adjudant/l'adjudant, empereur/l'empereur and inspecteur/l'inspecteur.

This will also simplify this code 👍

Thanks 😄