Missing Closing Quotes Cause Fatal Error

Bug can be reproduced as follows:
```shell
$ ./adhocsh git
> commit -m "
[...]
Traceback (most recent call last):
  File "./adhocsh.py", line 240, in <module>
    print ("Error: " + e.message)
                       ^^^^^^^^^
AttributeError: 'ValueError' object has no attribute 'message'
```