Reduce the size of floating numbers

@@ -72,7 +72,18 @@ class PdfNum extends PdfDataType {
     if (value is int) {
       s.putString(value.toInt().toString());
     } else {
-      s.putString(value.toStringAsFixed(precision));
+      var r = value.toStringAsFixed(precision);
+      if (r.contains('.')) {
+        var n = r.length - 1;
+        while (r[n] == '0') {
+          n--;
+        }
+        if (r[n] == '.') {
+          n--;
+        }
+        r = r.substring(0, n + 1);
+      }
+      s.putString(r);
     }
   }
 }

@@ -27,9 +27,9 @@ void main() {
 
   test('PdfDataTypes Num', () {
     expect(const PdfNum(0).toString(), '0');
-    expect(const PdfNum(.5).toString(), '0.50000');
+    expect(const PdfNum(.5).toString(), '0.5');
     expect(const PdfNum(50).toString(), '50');
-    expect(const PdfNum(50.1).toString(), '50.10000');
+    expect(const PdfNum(50.1).toString(), '50.1');
   });
 
   test('PdfDataTypes String', () {
@@ -84,7 +84,7 @@ void main() {
         PdfArray(),
         PdfDict(),
       ]).toString(),
-      '[/Name/Other false 2.50000 null(þÿ\x00h\x00e\x00l\x01B\x00o)[]<<>>]',
+      '[/Name/Other false 2.5 null(þÿ\x00h\x00e\x00l\x01B\x00o)[]<<>>]',
     );
   });