Added new test file and reverted modified test file

Author: marc-mabe

ext/standard/tests/math/number_format_negative_zero.phpt

@@ -4,28 +4,13 @@ Prevent number_format from returning negative zero
 <?php
 
 $number = -1.15E-15;
-var_dump($number);
-var_dump(number_format($number, 2));
 
-$number = -0.01;
 var_dump($number);
 var_dump(number_format($number, 2));
-
-$number = -1234567.89;
-var_dump($number);
-var_dump(number_format($number, -3));
-
-$number = -1234321.09;
-var_dump($number);
-var_dump(number_format($number, -3));
+var_dump(number_format(-0.01, 2));
 
 ?>
 --EXPECT--
 float(-1.15E-15)
 string(4) "0.00"
-float(-0.01)
 string(5) "-0.01"
-float(-1234567.89)
-string(10) "-1,235,000"
-float(-1234321.09)
-string(10) "-1,234,000"