* join paths made from this pair of sub-relations. (It will not need to
* be considered further up the join tree.)
*
- * In many case we will find the same RestrictInfos in both input
+ * In many cases we will find the same RestrictInfos in both input
* relations' joinlists, so be careful to eliminate duplicates.
* Pointer equality should be a sufficient test for dups, since all
* the various joinlist entries ultimately refer to RestrictInfos