help: fix example of revs() fileset

mercurial/help/filesets.txt

@@ -1,78 +1,78 b''
 Mercurial supports a functional language for selecting a set of
 files.
 
 Like other file patterns, this pattern type is indicated by a prefix,
 'set:'. The language supports a number of predicates which are joined
 by infix operators. Parenthesis can be used for grouping.
 
 Identifiers such as filenames or patterns must be quoted with single
 or double quotes if they contain characters outside of
 ``[.*{}[]?/\_a-zA-Z0-9\x80-\xff]`` or if they match one of the
 predefined predicates. This generally applies to file patterns other
 than globs and arguments for predicates.
 
 Special characters can be used in quoted identifiers by escaping them,
 e.g., ``\n`` is interpreted as a newline. To prevent them from being
 interpreted, strings can be prefixed with ``r``, e.g. ``r'...'``.
 
 See also :hg:`help patterns`.
 
 Operators
 =========
 
 There is a single prefix operator:
 
 ``not x``
   Files not in x. Short form is ``! x``.
 
 These are the supported infix operators:
 
 ``x and y``
   The intersection of files in x and y. Short form is ``x & y``.
 
 ``x or y``
   The union of files in x and y. There are two alternative short
   forms: ``x | y`` and ``x + y``.
 
 ``x - y``
   Files in x but not in y.
 
 Predicates
 ==========
 
 The following predicates are supported:
 
 .. predicatesmarker
 
 Examples
 ========
 
 Some sample queries:
 
 - Show status of files that appear to be binary in the working directory::
 
     hg status -A "set:binary()"
 
 - Forget files that are in .hgignore but are already tracked::
 
     hg forget "set:hgignore() and not ignored()"
 
 - Find text files that contain a string::
 
     hg files "set:grep(magic) and not binary()"
 
 - Find C files in a non-standard encoding::
 
     hg files "set:**.c and not encoding('UTF-8')"
 
 - Revert copies of large binary files::
 
     hg revert "set:copied() and binary() and size('>1M')"
 
 - Revert files that were added to the working directory::
 
-    hg revert "set:wdir(added())"
+    hg revert "set:revs('wdir()', added())"
 
 - Remove files listed in foo.lst that contain the letter a or b::
 
     hg remove "set: 'listfile:foo.lst' and (**a* or **b*)"