Make fuzzy search ignore case by default

[carreter]

Proposed solution

string_match method for FuzzyQuery should ignore case by making both pattern and value being matched against lowercase.

Objective

Goals

Make fuzzy searching... fuzzier. I don't see a scenario where one would want a fuzzy search but care about capitalization.

Alternative would be to make this behavior toggleable in the config or to have a different prefix for case sensitive vs case-insensitive fuzzy matching.

Non-goals

N/A

Anti-goals

This could result in unexpected behavior if a user depends on capitalization during fuzzy searching, but I don't see why one would.

[mirkosoft]

To be on the safe side, it might work similar to "smart case" in vim: it's ignoring case by default (assuming user's input is lowercased usually), but as soon as user put the uppercased char, case won't be ignored anymore.

[carreter]

Smartcase is the current behavior, but I don't think I agree with it.

We are already fuzzy-searching, so the situations where the user would care about case seem quite rare. It's far more likely that they wouldn't care, and that smartcase would just make things more confusing.