[klensy]

this reduces allocs in tidy from (dhat output)

==31349== Total:     1,365,199,543 bytes in 4,774,213 blocks
==31349== At t-gmax: 10,975,708 bytes in 66,093 blocks
==31349== At t-end:  2,880,947 bytes in 12,332 blocks
==31349== Reads:     5,210,008,956 bytes
==31349== Writes:    1,280,920,127 bytes

to

==66633== Total:     791,565,538 bytes in 3,503,144 blocks
==66633== At t-gmax: 10,914,511 bytes in 65,997 blocks
==66633== At t-end:  395,531 bytes in 941 blocks
==66633== Reads:     4,249,388,949 bytes
==66633== Writes:    814,119,580 bytes

by wrapping regex and updating ignore (effect probably not only from ignore, didn't measured)

also moves one more regex into Lazy to reduce regex rebuilds.