Template: fix re-assignment exception issue
Template: fix re-assignment exception issue

Do not try to print the old and new values of a re-assigned template
variable. If they are not scalars, they won't be convertable to a
string, and will cause a 500 error.

Instead, just state the variable that is being re-assigned, which
*should* be enough info to debug the issue.

smrealms/smr,hemberger/smr,smrealms/smr,hemberger/smr,hemberger/smr,smrealms/smr,hemberger/smr