Improvements in testdfa.c.
Sync dfa with GNU grep.
Minor fix in dbugeval test.
Start adding summary sections.
More summary sections.
Some docbook tweaks.
Update docbook figure markup.
More summaries. Through chapter 10.
And more summaries in the doc.
Fix typos for filename macro in doc.
Another typo fix.
Finish up summaries. Improvements in mystrtonum().
Start adding exercises.
Finish exercises, update chapter 15, menus. Update NEWS.
Minor fixes, esp for docbook.
Subsections in 6.1.4.
Add more comments and whitespace for do_sub().
Bug fix for poundbang test.
Add more thanks, minor revision in doc.
Fix memory leak in regcomp.c.