Avoid errors that occur when milestones were non ascii characters.

When I write a commit message, the following error has occurred.

```
Error detected while processing function <SNR>106_setupOmni:
line    9:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 282, in populateOmniComplete
UnicodeEncodeError: 'ascii' codec can't encode characters in position 2-13: ordinal not in range(128)
```