First step in process of removing cache
Adjusting wrap width in source (was too small)
Simplified `@_changeFilesystem()`
Updated mkdir to drop changeFilesystem dependency
Updated write to drop changeFilesystem dependency
Updated append to drop changeFilesystem dependency
Updated rm to drop changeFilesystem dependency
Updated cp to drop changeFilesystem dependency
Updated mv to drop changeFilesystem dependency
Removed changeFilesystem entirely (from tests too)
Adjusting wrap width in unit tests (was too small)
changeFilesystem dependencies removed; mark as done