Fix analyzer warnings in the YAML package.

pkg/yaml/lib/src/deep_equals.dart

Index: pkg/yaml/lib/src/deep_equals.dart
diff --git a/pkg/yaml/lib/src/deep_equals.dart b/pkg/yaml/lib/src/deep_equals.dart
index bce4aadf2e9c29b222c662d07d653c2674fa7c0e..1e1f7ed76c5a949a33de3587d78981244b3780b2 100644
--- a/pkg/yaml/lib/src/deep_equals.dart
+++ b/pkg/yaml/lib/src/deep_equals.dart
@@ -4,8 +4,10 @@
 
 library deep_equals;
 
-/// Returns whether two objects are structurally equivalent. This considers NaN
-/// values to be equivalent. It also handles self-referential structures.
+/// Returns whether two objects are structurally equivalent.
+///
+/// This considers `NaN` values to be equivalent. It also handles
+/// self-referential structures.
 bool deepEquals(obj1, obj2, [List parents1, List parents2]) {
   if (identical(obj1, obj2)) return true;
   if (parents1 == null) {
@@ -30,8 +32,8 @@ bool deepEquals(obj1, obj2, [List parents1, List parents2]) {
       return _listEquals(obj1, obj2, parents1, parents2);
     } else if (obj1 is Map && obj2 is Map) {
       return _mapEquals(obj1, obj2, parents1, parents2);
-    } else if (obj1 is double && obj2 is double) {
-      return _doubleEquals(obj1, obj2);
+    } else if (obj1 is num && obj2 is num) {
+      return _numEquals(obj1, obj2);
     } else {
       return obj1 == obj2;
     }
@@ -64,9 +66,11 @@ bool _mapEquals(Map map1, Map map2, List parents1, List parents2) {
   return true;
 }
 
-/// Returns whether two doubles are equivalent. This differs from `d1 == d2` in
-/// that it considers NaN to be equal to itself.
-bool _doubleEquals(double d1, double d2) {
-  if (d1.isNaN && d2.isNaN) return true;
-  return d1 == d2;
+/// Returns whether two numbers are equivalent.
+///
+/// This differs from `n1 == n2` in that it considers `NaN` to be equal to
+/// itself.
+bool _numEquals(num n1, num n2) {
+  if (n1.isNaN && n2.isNaN) return true;
+  return n1 == n2;
 }