Add newsitem for the two new unittest methods.

Also, made some whitespace cleanup.

Misc/NEWS

@@ -437,6 +437,12 @@ Extension modules
 Library
 -------
 
+- unittest.py now has two additional methods called assertAlmostEqual()
+  and failIfAlmostEqual().  They implement an approximate comparision
+  by rounding the difference between the two arguments and comparing
+  the result to zero.  Approximate comparision is essential for
+  unit tests of floating point results.
+
 - calendar.py now depends on the new datetime module rather than
   the time module.  As a result, the range of allowable dates
   has been increased.
@@ -1645,13 +1651,13 @@ Windows
       signal.signal(signal.SIGBREAK, signal.default_int_handler)
 
       try:
-	  while 1:
-	      pass
+          while 1:
+              pass
       except KeyboardInterrupt:
-	  # We get here on Ctrl+C or Ctrl+Break now; if we had not changed
-	  # SIGBREAK, only on Ctrl+C (and Ctrl+Break would terminate the
-	  # program without the possibility for any Python-level cleanup).
-	  print "Clean exit"
+          # We get here on Ctrl+C or Ctrl+Break now; if we had not changed
+          # SIGBREAK, only on Ctrl+C (and Ctrl+Break would terminate the
+          # program without the possibility for any Python-level cleanup).
+          print "Clean exit"
 
 
 What's New in Python 2.2a4?
@@ -2008,7 +2014,7 @@ C API
 
       double x = PyLong_AsDouble(some_long_object);
       if (x == -1.0 && PyErr_Occurred()) {
-	      /* The conversion failed. */
+              /* The conversion failed. */
       }
 
 - The GC API has been changed.  Extensions that use the old API will still