[Issue 231] long is 4-byte aligned in unittest with 4 character module name

[Sean Kelly]

BCS wrote:
> The length of the error messages might be making a difference.
> 
> "161x(6): Assertion failure"
> "161_1(6): Assertion failure"
> 
> What was the last version that you tried it with? If it was pre 0.160 
> then the change to assert semantics might be causing this.

Good idea--it was pre-160.  I haven't unit tested this code for a while.