revsets.txt: minor improvements

mercurial/help/revsets.txt

@@ -58,8 +58,7 The following predicates are supported:
   Alias for ``user(string)``.
 
 ``branch(set)``
-  The branch names are found for changesets in set, and the result is
-  all changesets belonging to one those branches.
+  All changesets belonging to the branches of changesets in set.
 
 ``children(set)``
   Child changesets of changesets in set.
@@ -74,10 +73,10 The following predicates are supported:
   Changesets within the interval, see :hg:`help dates`.
 
 ``descendants(set)``
-  Changesets which are decendants of changesets in set.
+  Changesets which are descendants of changesets in set.
 
 ``file(pattern)``
-  Changesets which manually affected files matching pattern.
+  Changesets affecting files matched by pattern.
 
 ``follow()``
   An alias for ``::.`` (ancestors of the working copy's first parent).
@@ -105,10 +104,11 The following predicates are supported:
   Changeset is a merge changeset.
 
 ``modifies(pattern)``
-  Changesets which modify files matching pattern.
+  Changesets modifying files matched by pattern.
 
 ``outgoing([path])``
-  Changesets missing in path.
+  Changesets not found in the specified destination repository, or the
+  default push location.
 
 ``p1(set)``
   First parent of changesets in set.