Redaction regexes seem to get lowercased before being applied

It seems like the system takes the regex and lowercases it before running against the string in question, but this changes the meaning of the regex.

For example:
/(Bob|Carol|Ted|Alice)/
won't actually catch Bob in the string "I sent it to Bob on Jan 24.", because the regex being applied is
/(bob|carol|ted|alice)/

If the intention was to have all regexes be run case-insensitively, then I think it's better just to let the user add the "i" switch to the regex themselves if that's what they want.