clawpack/pyclaw — pull request #237 by amal-ghamdi (2013-03-12 13:58:59+00:00)
Title:  #187 fix: Add a check to prevent the user from adding two dimensions with the same name

This is suggested fix for issue #187.

I have a question here,,, there are two error messages with the same content,
what do you think is the best practice for such case. I thought of creating exception class
for that but I'm not sure if this is the right way to go
```
class DimensionNameError(Exception):
def __str__(self):
return "the specific message that could include args"
```