CE edit KB_DELETE the following line

ce/gapbuffer.c

@@ -112,3 +112,10 @@ char* gapbuffer_string_at (gb_malloc_func_t mallocfn, void* ctx, struct gapbuffe
   res[written] = '\0';
   return res;
 }
+
+char gapbuffer_at (struct gapbuffer* gb, size_t index) {
+  if (index < gb->gap_start)
+    return gb->buffer[index];
+  else
+    return gb->buffer[index + (gb->gap_end - gb->gap_start)];
+}