2.1a

This new version updates Biblatex-mla for better compliance with the 9th edition of the MLA Handbook (2021). The documentation is substantially updated, with more than 200 examples from the Handbook converted into BibTeX format. Additionally, support has been added for @dataset, @performance, and @software entry types, and the @movie type has been differentiated from @video. New entry options "containerized", "datebrackets", "uniquenamea", "uniquenameb", "uniquenamec" allow for easier customization of individual entries. Finally, localizations have been updated in English, Italian, Spanish, and Portuguese, and other various errors have been fixed. Version 2.1a corrects language settings in the documentation from 2.1.