plugin fail to generate changelog with accent in name

Here is an example:

```
+ export DEBEMAIL=
+ export DEBFULLNAME=Guillaume Desv??
/tmp/hudson7011841467937907788.sh: 2: export: Desv??: bad variable name
```

`Guillaume Desv??` is `Guillaume Desvé`

No source file or test is named; start by locating the plugin's changelog-generation entry point and reproduce the shown export failure with Guillaume Desvé as DEBFULLNAME. Done means changelog generation completes without a bad-variable-name error for accented names.

Written by the indexing model from the issue text.