Unify Date.fromString and support more Iso 8601.

tests/co19/co19-leg.status

Index: tests/co19/co19-leg.status
diff --git a/tests/co19/co19-leg.status b/tests/co19/co19-leg.status
index 72d89e500d27c24d8850c0a7d1486438dfb34d1d..070436e0c95494877e09031c584c0b85e16c334c 100644
--- a/tests/co19/co19-leg.status
+++ b/tests/co19/co19-leg.status
@@ -212,9 +212,8 @@ Language/10_Expressions/01_Constants_A17_t01: Skip # Times out.
 
 
 # Issues with co19 test suite.
-LibTest/core/Date/Date.fromString_A01_t02: Fail, OK # Undocumented behavior.
-LibTest/core/Date/Date.fromString_A01_t03: Fail, OK # Undocumented behavior.
-LibTest/core/Date/Date.fromString_A01_t04: Fail, OK # Undocumented behavior.
+LibTest/core/Date/Date.fromString_A01_t02: Fail, OK # co19 issue 88.
+LibTest/core/Date/Date.fromString_A01_t04: Fail, OK # co19 issue 88.
 LibTest/core/Date/Date_A01_t01: Fail, OK # Generates bad date and expect exact print string.
 LibTest/core/Date/year_A01_t01: Fail, OK # Requires big int.
 LibTest/core/List/sort_A01_t02: Fail, OK # No method List.copyFrom.
@@ -272,7 +271,7 @@ Language/06_Functions/2_Formal_Parameters/2_Named_Optional_Formals_A01_t01: Fail
 Language/07_Classes/8_Superclasses/1_Inheritance_and_Overriding_A02_t03: Fail # SsaBuilder.visitIdentifier on non-this
 Language/13_Types/5_Function_Types_A02_t03: Fail # Cannot find value
 LibTest/core/Date/Date.fromEpoch_A01_t02: Fail # Expect.fail('Exception expected with the passed null value of the timeZone')
-LibTest/core/Date/Date.fromString_A05_t01: Fail # Expect.fail('Some exception is expected')
+LibTest/core/Date/toString_A02_t01: Fail # Test is out of date. See co19 issue 86.
 LibTest/core/Expect/throws_A02_t01: Fail # Bad code generation.
 LibTest/core/FallThroughError/toString_A01_t02: Fail # switch cases are not implemented
 LibTest/core/Isolate/port_A01_t01: Fail # Cannot find value