disable testing the stable channel on travis

.travis.yml

@@ -2,7 +2,8 @@ language: dart
 sudo: false
 dart:
   - dev
-  - stable
+# Disabled - re-enable once dev goes stable (see #1290).
+#  - stable
 env:
   - GEN_SDK_DOCS=true
   - GEN_SDK_DOCS=false

testing/test_package_docs/fake/ExtraSpecialList/contains.html

@@ -158,7 +158,7 @@ <h5><a href="fake/ExtraSpecialList-class.html">ExtraSpecialList</a></h5>
 <code>element</code>, unless it has a more efficient way to find an element
 equal to <code>element</code>.</p>
 <p>The equality used to determine whether <code>element</code> is equal to an element of
-the iterable defaults to the <code>Object.operator==</code> of the element.</p>
+the iterable defaults to the <code>Object.==</code> of the element.</p>
 <p>Some types of iterable may have a different equality used for its elements.
 For example, a <code>Set</code> may have a custom equality
 (see <code>Set.identical</code>) that its <code>contains</code> uses.

testing/test_package_docs/fake/SpecialList/contains.html

@@ -158,7 +158,7 @@ <h5><a href="fake/SpecialList-class.html">SpecialList</a></h5>
 <code>element</code>, unless it has a more efficient way to find an element
 equal to <code>element</code>.</p>
 <p>The equality used to determine whether <code>element</code> is equal to an element of
-the iterable defaults to the <code>Object.operator==</code> of the element.</p>
+the iterable defaults to the <code>Object.==</code> of the element.</p>
 <p>Some types of iterable may have a different equality used for its elements.
 For example, a <code>Set</code> may have a custom equality
 (see <code>Set.identical</code>) that its <code>contains</code> uses.