Escape special characters when searching for contributors
Add assets task for convenience

So updating will be consistent on this release branch and develop:
$ inv assets
$ sudo service uwsgi restart
fix the warning
regression test added
Merge pull request #1378 from chennan47/feature/view_only_link_banner_fix

Feature/view only link banner fix
Merge branch 'master' into release/0.22.0
Merge branch 'release/0.22.0' of https://github.com/CenterForOpenScience/osf.io into release/0.22.0
Merge branch 'lyndsysimon-hotfix/footer-safari' into release/0.22.0
Merge branch 'hotfix/0.21.37'
Merge branch 'master' into release/0.22.0
Merge branch 'hotfix/0.21.38'
Merge branch 'master' into release/0.22.0
Merge branch 'huangginny-feature/search-contrib-escape' into release/0.22.0
Merge branch 'release/0.22.0' into develop
Remove duplicate assets task