Clean vim registers before each test.
legacy tests: migrate test23
legacy tests: migrate test41
Delete functions before each test.
Add eval workaround to request helper method
legacy tests: migrate test54
legacy tests: migrate test27
legacy tests: migrate test46
legacy tests: migrate test97
legacy tests: migrate test20
legacy tests: migrate test28
Export dedent helper method.
legacy tests: migrate test6
legacy tests: migrate test7