Update sys.float_info

Author: msimacek

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/SysModuleBuiltins.java

@@ -411,17 +411,16 @@ public void initialize(Python3Core core) {
         builtinConstants.put("version", PythonLanguage.VERSION +
                         " (" + COMPILE_TIME + ")" +
                         "\n[Graal, " + Truffle.getRuntime().getName() + ", Java " + System.getProperty("java.version") + "]");
-        // the default values taken from JPython
         builtinConstants.put("float_info", factory.createStructSeq(FLOAT_INFO_DESC,
                         Double.MAX_VALUE,           // DBL_MAX
                         Double.MAX_EXPONENT + 1,    // DBL_MAX_EXP
                         308,                        // DBL_MIN_10_EXP
-                        Double.MIN_VALUE,           // DBL_MIN
-                        Double.MIN_EXPONENT,        // DBL_MIN_EXP
+                        Double.MIN_NORMAL,          // DBL_MIN
+                        Double.MIN_EXPONENT + 1,    // DBL_MIN_EXP
                         -307,                       // DBL_MIN_10_EXP
-                        10,                         // DBL_DIG
+                        15,                         // DBL_DIG
                         53,                         // DBL_MANT_DIG
-                        2.2204460492503131e-16,     // DBL_EPSILON
+                        Math.ulp(1.0),              // DBL_EPSILON
                         2,                          // FLT_RADIX
                         1                           // FLT_ROUNDS
         ));