Rename variables without trailing _

* Whitespace
Whitespace, rename variables without trailing _
Rename variables without trailing _
Rename variables without trailing _
Rename variables without trailing _
Cleanup #indexes_with_rgeo

* Rename variables without trailing _
* Prefer string interpolation to concatenation
* Whitespace
* Use “if any?” instead of “unless empty?”
Rename test file
Remove namespace from test class

* Rename test class to BasicTest
* Remove unnecessary :: scoping
Cleanup tests

* Whitespace
* Rename variables with trailing _
* Move #arel_visitor to private method in test class
Update hash syntax, whitespace
Rename local variable