Revert "Remove @deprecated features."

pkg/unittest/lib/src/iterable_matchers.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of matcher;
 
 /**
  * Returns a matcher which matches [Iterable]s in which all elements
  * match the given [matcher].
  */
@@ skipping 40 matching lines @@
       }
       mismatchDescription.add(' at index $index');
       return mismatchDescription;
     }
     return super.describeMismatch(item, mismatchDescription,
           matchState, verbose);
   }
 }
 
 /**
+ * Deprecated form of [anyElement].
+ */
+@deprecated
+Matcher someElement(matcher) => new _AnyElement(wrapMatcher(matcher));
+
+/**
  * Returns a matcher which matches [Iterable]s in which at least one
  * element matches the given [matcher].
  */
 Matcher anyElement(matcher) => new _AnyElement(wrapMatcher(matcher));
 
 class _AnyElement extends _IterableMatcher {
   Matcher _matcher;
 
   _AnyElement(this._matcher);
 
@@ skipping 147 matching lines @@
       iterator.moveNext();
       if (!_comparator(e, iterator.current)) {
         addStateInfo(matchState, {'index': i, 'expected': e,
             'actual': iterator.current});
         return false;
       }
       i++;
     }
     return true;
   }
-
+    
   Description describe(Description description) =>
       description.add('pairwise $_description ').addDescriptionOf(_expected);
 
   Description describeMismatch(item, Description mismatchDescription,
                                Map matchState, bool verbose) {
     if (item is !Iterable) {
       return mismatchDescription.add('is not an Iterable');
     } else if (item.length != _expected.length) {
       return mismatchDescription.
           add('has length ${item.length} instead of ${_expected.length}');
     } else {
       return mismatchDescription.
           add('has ').
           addDescriptionOf(matchState["actual"]).
           add(' which is not $_description ').
           addDescriptionOf(matchState["expected"]).
           add(' at index ${matchState["index"]}');
     }
   }
 }