Searches with hyphens don't highlight search term in note

Same issue as https://github.com/Automattic/simplenote-ios/issues/293, when you search for a hyphenated word Simplenote does not highlight the term.

### Expected
To see the full term highlighted.

### Observed
Note with the term appears on search results but searched content isn't highlighted on the list of results nor in the note content.

### Reproduced
1. Add a hyphenated word or phone number into a note (for instance, `follow-up`)
2. Search for a part of that word or phone number with the hyphen (i.e., `follow-`) or the entire string (`follow-up`)

Currently using Simplenote 2.15.1

Start by reproducing the issue in a note containing a hyphenated word or phone number, then search for a partial or complete hyphenated term. Check highlighting in both the search-results list and note content; done means the full searched term is highlighted in both places.

Written by the indexing model from the issue text.