largefiles: test "lfconvert --to-normal" with rename/remove/merge This gets us very close to full test coverage of lfconvert. The only features not tested are: - .hgtags conversion - abort when largefile becomes symlink

largefiles: test lfconvert with rename, remove, and merge

largefiles: beef up test-lfconvert.t so it's more thorough - instead of converting a single changeset with a single file, convert two changesets which each add a mix of normal and large files - make one of the large files not-so-large, but identified as large by filename - use shorter, simpler filenames - put some files in a subdirectory - test that file contents are correctly converted - drop unnecessary cleanup step