Relax Pure::Parser's comment regex...

...to allow any character sequence, including "/*", before then end
sequence of a multi-line ANSI C-style comment
.

test/json/json_parser_test.rb

@@ -272,6 +272,14 @@ EOT
 EOT
     assert_raise(ParserError) { parse(json) }
     json = <<EOT
+{
+  "key1":"value1"  /* multi line
+                    // nested eol comment
+                    /* legal nested multi line comment start sequence */
+}
+EOT
+    assert_equal({ "key1" => "value1" }, parse(json))
+    json = <<EOT
 {
   "key1":"value1"  /* multi line
                    // nested eol comment