.PP
The comment regarding State #8 indicates there's a problem
when "foob" has been scanned. Indeed, on any character other
-than a 'b', the scanner will have to back up to accept "foo".
+than an 'a', the scanner will have to back up to accept "foo".
Similarly, the comment for State #9 concerns when "fooba" has
-been scanned.
+been scanned and an 'r' does not follow.
.PP
The final comment reminds us that there's no point going to
all the trouble of removing backtracking from the rules unless