6355704: (fmt) %f formatting of BigDecimals is incorrect

Reviewed-by: darcy
Contributed-by: brian.burkhalter@oracle.com

test/java/util/Formatter/Basic-X.java.template

@@ -1103,6 +1103,15 @@ public class Basic$Type$ extends Basic {
         test("%.5f", "1.99999", val);
         test("%.6f", "1.999990", val);
 
+        val = new BigDecimal(0.9996);
+        test("%.0f", "1", val);
+        test("%.1f", "1.0", val);
+        test("%.2f", "1.00", val);
+        test("%.3f", "1.000", val);
+        test("%.4f", "0.9996", val);
+        test("%.5f", "0.99960", val);
+        test("%.6f", "0.999600", val);
+
 #end[BigDecimal]
 
 #if[float]

test/java/util/Formatter/BasicBigDecimal.java

@@ -1102,6 +1102,15 @@ public class BasicBigDecimal extends Basic {
         test("%.4f", "2.0000", val);
         test("%.5f", "1.99999", val);
         test("%.6f", "1.999990", val);
+
+        val = new BigDecimal(0.9996);
+        test("%.0f", "1", val);
+        test("%.1f", "1.0", val);
+        test("%.2f", "1.00", val);
+        test("%.3f", "1.000", val);
+        test("%.4f", "0.9996", val);
+        test("%.5f", "0.99960", val);
+        test("%.6f", "0.999600", val);