Whitespace normalization.  Ran reindent.py over the entire source tree.
diff --git a/Demo/scripts/fact.py b/Demo/scripts/fact.py
index 6cc389e..5497f66 100755
--- a/Demo/scripts/fact.py
+++ b/Demo/scripts/fact.py
@@ -8,41 +8,41 @@
 import sys
 from math import sqrt
 
-error = 'fact.error'		# exception
+error = 'fact.error'            # exception
 
 def fact(n):
-	if n < 1: raise error	# fact() argument should be >= 1
-	if n == 1: return []	# special case
-	res = []
-	# Treat even factors special, so we can use i = i+2 later
-	while n%2 == 0:
-		res.append(2)
-		n = n/2
-	# Try odd numbers up to sqrt(n)
-	limit = sqrt(float(n+1))
-	i = 3
-	while i <= limit:
-		if n%i == 0:
-			res.append(i)
-			n = n/i
-			limit = sqrt(n+1)
-		else:
-			i = i+2
-	if n != 1:
-		res.append(n)
-	return res
+    if n < 1: raise error   # fact() argument should be >= 1
+    if n == 1: return []    # special case
+    res = []
+    # Treat even factors special, so we can use i = i+2 later
+    while n%2 == 0:
+        res.append(2)
+        n = n/2
+    # Try odd numbers up to sqrt(n)
+    limit = sqrt(float(n+1))
+    i = 3
+    while i <= limit:
+        if n%i == 0:
+            res.append(i)
+            n = n/i
+            limit = sqrt(n+1)
+        else:
+            i = i+2
+    if n != 1:
+        res.append(n)
+    return res
 
 def main():
-	if len(sys.argv) > 1:
-		for arg in sys.argv[1:]:
-			n = eval(arg)
-			print n, fact(n)
-	else:
-		try:
-			while 1:
-				n = input()
-				print n, fact(n)
-		except EOFError:
-			pass
+    if len(sys.argv) > 1:
+        for arg in sys.argv[1:]:
+            n = eval(arg)
+            print n, fact(n)
+    else:
+        try:
+            while 1:
+                n = input()
+                print n, fact(n)
+        except EOFError:
+            pass
 
 main()