updated for version 7.3.1013
Problem:    New regexp logging is a bit messy.
Solution:   Consistently use #defines, add explanatory comment. (Taro Muraoka)
Added tag v7-3-1013 for changeset 1be43c095aff
updated for version 7.3.1014
Problem:    New regexp state dump is hard to read.
Solution:   Make the state dump more pretty. (Taro Muraoka)
Added tag v7-3-1014 for changeset 6a2005efa02b