In the latest GS1 Application Identifier dataset, there are four AIs
with optional pattern groups. When the value matches everything but the
optional pattern group, the group's value becomes None. This caused
Biip to crash when we tried building a string of the characters
matching the pattern.
In the latest GS1 Application Identifier dataset, there are four AIs with optional pattern groups. When the value matches everything but the optional pattern group, the group's value becomes
None. This caused Biip to crash when we tried building a string of the characters matching the pattern.Fixes #295