Merge branch 'hotfix/1.22.3' into stable
remove rubinius rdoc link - the gem is not builtin, fix #2188
Allow for proper display of Unicode characters in help documentation
Merge pull request #2194 from dougjohnston/master

Allow for proper display of Unicode characters in help documentation
Fix syntax error in migrate script

```
migrate: line 98: syntax error near unexpected token `fi'
```
Merge pull request #2195 from felixbuenemann/fix-migrate

Fix syntax error in migrate script
formating ifs in migrate, update #2195
clean setting source and destination ruby in migrate, update 2195
Make _system_name_lowercase available for unknown systems. Some code clean-up
Merge pull request #2196 from Ch00k/master

Make _system_name_lowercase available for unknown systems. Some code cleanup
fix checking for fallback url after the ruby url change, update #2136, fix #2197
Merge branch 'master' of github.com:wayneeseguin/rvm
extend checking for fallback urls, fix the 'rvm tools mirror' command, update #2136, update #2197
1.22.4
Merge branch 'master' into hotfix/1.22.4
Merge branch 'hotfix/1.22.4'