readme: add neatvi ref, pike: misc style fixes

README

@@ -43,6 +43,9 @@ or class is a space we want to match not assert at. But the code for it was too
 dirty and I scrapped it. Syntax for word assertions are like posix C library, not
 the pcre "\b" which can be used both in front or back of the word, because there is
 no distinction, it makes the implementation potentially even uglier.
+* Assert flags like REG_ICASE,REG_NOTEOL,REG_NOTBOL and lookahead inside
+negated bracket are implemented here (also shows use case in real world project):
+https://github.com/kyx0r/neatvi/blob/pikevm/regex.c
 
 NOTES
 =====

pike.c

@@ -490,10 +490,10 @@ goto next##nn; \
 		fastrec(nn, list, listidx) \
 	case SAVE: \
 		if (sub->ref > 1) { \
+			sub->ref--; \
 			newsub() \
 			for (j = 0; j < nsubp; j++) \
 				s1->sub[j] = sub->sub[j]; \
-			sub->ref--; \
 			sub = s1; \
 			sub->ref = 1; \
 		} \