Fix some bad documentation links.

sdk/lib/core/num.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.core;
 
 /**
  * An integer or floating-point number.
  *
  * It is a compile-time error for any type other than [int] or [double]
@@ skipping 398 matching lines @@
   /**
    * Returns the shortest string that correctly represent the input number.
    *
    * All [double]s in the range `10^-6` (inclusive) to `10^21` (exclusive)
    * are converted to their decimal representation with at least one digit
    * after the decimal point. For all other doubles,
    * except for special values like `NaN` or `Infinity`, this method returns an
    * exponential representation (see [toStringAsExponential]).
    *
    * Returns `"NaN"` for [double.NAN], `"Infinity"` for [double.INFINITY], and
-   * `"-Infinity"` for [double.MINUS_INFINITY].
+   * `"-Infinity"` for [double.NEGATIVE_INFINITY].
    *
    * An [int] is converted to a decimal representation with no decimal point.
    *
    * Examples:
    *
    *     (0.000001).toString();  // "0.000001"
    *     (0.0000001).toString(); // "1e-7"
    *     (111111111111111111111.0).toString();  // "111111111111111110000.0"
    *     (100000000000000000000.0).toString();  // "100000000000000000000.0"
    *     (1000000000000000000000.0).toString(); // "1e+21"
@@ skipping 41 matching lines @@
     result = double.parse(source, _returnDoubleNull);
     if (result != null) return result;
     if (onError == null) throw new FormatException(input);
     return onError(input);
   }
 
   /** Helper functions for [parse]. */
   static int _returnIntNull(String _) => null;
   static double _returnDoubleNull(String _) => null;
 }