* Keep old exception messages (avoid breaking-changes for users relying on exception messages)
* Move ``get_expected_str`` out of _exceptions.py, where it does not belong, to its own file in _parser/_parsing_check.py
This allows FullyQualifiedNameProvider to work with absolute paths,
rather than assuming all paths given will be relative to the current
directory. This enables tools like Fixit to provide a root path, and
have the FullyQualifiedNameProvider correctly scope the final results
relative to that root path.
This does require that both the root path and the given file paths
match the other as relative or absolute, due to the
`calculate_module_and_package` helper comparing file paths relative
to the root path, but this seems like a reasonable tradeoff, and
unlikely to cause a problem in normal use cases.
* Always compute a module and package name
* Update name_provider to correctly support __main__ (also updated the tests to use data_provider)
* Update name_provider to correctly handle relative imports and package name
* Update relative module resolution to work on package names
* Use full_package_name in libcst.codemod.visitors.GatherImportsVisitor
* Use full_package_name in libcst.codemod.visitors.RemovedNodeVisitor
* Use full_package_name in libcst.codemod.visitors.AddImportsVisitor
* Fix failing test
* Fix typo in variable name
* PR feedback
* Force rebuild
* Support module and package names in the codemod context
* PR feedback
* Reorganize module name and relative name logic to libcst.helpers.module
* Force rebuild
