database/sql: trivial documentation fixes

Change-Id: I573172384eaf32daaca5021a9a1874bf0f3d340f
Reviewed-on: https://go-review.googlesource.com/110575Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/database/sql/sql.go

@@ -792,8 +792,8 @@ func (db *DB) maxIdleConnsLocked() int {
 // SetMaxIdleConns sets the maximum number of connections in the idle
 // connection pool.
 //
-// If MaxOpenConns is greater than 0 but less than the new MaxIdleConns
-// then the new MaxIdleConns will be reduced to match the MaxOpenConns limit
+// If MaxOpenConns is greater than 0 but less than the new MaxIdleConns,
+// then the new MaxIdleConns will be reduced to match the MaxOpenConns limit.
 //
 // If n <= 0, no idle connections are retained.
 func (db *DB) SetMaxIdleConns(n int) {
@@ -825,7 +825,7 @@ func (db *DB) SetMaxIdleConns(n int) {
 //
 // If MaxIdleConns is greater than 0 and the new MaxOpenConns is less than
 // MaxIdleConns, then MaxIdleConns will be reduced to match the new
-// MaxOpenConns limit
+// MaxOpenConns limit.
 //
 // If n <= 0, then there is no limit on the number of open connections.
 // The default is 0 (unlimited).