Fix query tests for v2 features

[lucaswoj]

cc @jfirebaugh @ansis @jakepruitt @mapsam

There are a number of tests that began failing after the v2 upgrade due to reliance on undefined behaviour. These tests fall into two categories:

Failing Hidden Symbol Tests

These tests were relying on label placement. Changes in geometries, such as merging lines with identical properties, caused the label placement to shift enough to cause these tests to fail.

What the test was supposed to be

What the test was after v2 upgrade

Other Failing Tests

Many other tests were failing because they were querying the edge of rendered features, getting just enough of an antialiased pixel to return the expected results.

Bonus: expected.json Indentation

The query-tests/*/*/expected.json files now use 4 spaces for indentation, consistent with other JSON files in this repository.

[jfirebaugh]

2 space indent is actually the standard. That's what all render test style.jsons use, due to it being gl-style-formats default.

[lucaswoj]

It looks like

• query-tests/*/*/style.json use 4 spaces (but they should have been using two, this tripped me up)
• render-tests/*/*/style.json use 2 spaces per gl-style-format

I'll add a commit to make sure 2 spaces are used everywhere.

[lucaswoj]

I pushed a commit that makes all JSON files now use 2-space indentation (and provides a utility format JSON files in the future).

[jfirebaugh]

👍 🚢