@@ -155,6 +155,7 @@
155 ?: forward
155 ?: forward
156 ?: (gth (add index offset) (dec (lent text))) ''
156 ?: (gth (add index offset) (dec (lent text))) ''
157 (snag (add index offset) text)
157 (snag (add index offset) text)
158+ ?: (lth index offset) ''
158 ?: (lth (sub index offset) 0) ''
159 ?: (lth (sub index offset) 0) ''
159 (snag (sub index offset) text)
160 (snag (sub index offset) text)