Update documentation on .fromEnvironment. Make bool default be false.

runtime/lib/bool_patch.dart

Index: runtime/lib/bool_patch.dart
diff --git a/runtime/lib/bool_patch.dart b/runtime/lib/bool_patch.dart
index cd6b7408a0c4deb59d8ac23ddaab6532995bf458..64da8fe558336ad92fa60360ea945a9e512c2f55 100644
--- a/runtime/lib/bool_patch.dart
+++ b/runtime/lib/bool_patch.dart
@@ -7,7 +7,7 @@
 patch class bool {
 
   /* patch */ const factory bool.fromEnvironment(String name,
-                                                 {bool defaultValue})
+                                                 {bool defaultValue = false})

[Søren Gjesse, 2013/10/31 08:14:30]

I guess this is OK, you can then use defautValue: null to check for "in
environment".

[Lasse Reichstein Nielsen, 2013/10/31 11:52:19]

You can, but you /should/ use the String constructor for that.

       native "Bool_fromEnvironment";
 
   int get _identityHashCode {