New sentences start on new lines, fix two violations

Reviewed by:	bcr
Sponsored by:	BSDCan Dev Summit

cddl/contrib/opensolaris/cmd/zpool/zpool-features.7

@@ -48,13 +48,15 @@ to send file systems between pools.
 Since most features can be enabled independently of each other the on\-disk
 format of the pool is specified by the set of all features marked as
 .Sy active
-on the pool. If the pool was created by another software version this set may
+on the pool.
+If the pool was created by another software version this set may
 include unsupported features.
 .Ss Identifying features
 Every feature has a guid of the form
 .Sy com.example:feature_name .
 The reverse DNS name ensures that the feature's guid is unique across all ZFS
-implementations. When unsupported features are encountered on a pool they will
+implementations.
+When unsupported features are encountered on a pool they will
 be identified by their guids.
 Refer to the documentation for the ZFS implementation that created the pool
 for information about those features.
@@ -283,7 +285,8 @@ configuration.
 .El
 .Pp
 This features allows ZFS to maintain more information about how free space
-is organized within the pool. If this feature is
+is organized within the pool.
+If this feature is
 .Sy enabled ,
 ZFS will
 set this feature to
@@ -337,7 +340,8 @@ All bookmarks in the pool can be listed by running
 .El
 .Pp
 Once this feature is enabled ZFS records the transaction group number
-in which new features are enabled. This has no user-visible impact,
+in which new features are enabled.
+This has no user-visible impact,
 but other features may depend on this feature.
 .Pp
 This feature becomes