struct region_cache *CACHE,
int HEAD, int TAIL));
-/* The scanning functions.
+/* The scanning functions.
Basically, if you're scanning forward/backward from position POS,
and region_cache_forward/backward returns true, you can skip all
might be able to avoid scanning it again. */
/* Return true if the text immediately after POS in BUF is known, for
- the purposes of CACHE. If NEXT is non-zero, set *NEXT to the nearest
+ the purposes of CACHE. If NEXT is non-zero, set *NEXT to the nearest
position after POS where the knownness changes. */
extern int region_cache_forward P_ ((struct buffer *BUF,
struct region_cache *CACHE,