Agree with Vyacheslav - reviewers can either fix the issues or ask to fix them. After several PRs new contributors will get used with project requirements.
As far as one time contributions, they are usually pretty simple and should not take any significant time to fix. If one time contirbutor returns with more contributions then he or she should account all the changes made on review and, again, come to a point where all project requirements are staisfied. Btw, Vyacheslav, can we have abbreviations.properties in the project under git and have plugin use it? --Yakov