Should smart case apply on a per-argument basis or for all patterns.

[tmccombs]

Currently, if you use multiple patterns, using --and, if any of the patterns has an uppercase character, then all of them will be treated as case-sensitive (following our smart case pattern).

However, I'm not sure if that really makes sense, and wonder if it would be better to instead handle each pattern individually.

One downside to changing it is that that could be a backwards incompatible change.