Whitespace normalization.
diff --git a/Tools/scripts/byteyears.py b/Tools/scripts/byteyears.py
index bada5a5..f67be70 100755
--- a/Tools/scripts/byteyears.py
+++ b/Tools/scripts/byteyears.py
@@ -12,46 +12,46 @@
 
 # Use lstat() to stat files if it exists, else stat()
 try:
-	statfunc = os.lstat
+    statfunc = os.lstat
 except AttributeError:
-	statfunc = os.stat
+    statfunc = os.stat
 
 # Parse options
 if sys.argv[1] == '-m':
-	itime = ST_MTIME
-	del sys.argv[1]
+    itime = ST_MTIME
+    del sys.argv[1]
 elif sys.argv[1] == '-c':
-	itime = ST_CTIME
-	del sys.argv[1]
+    itime = ST_CTIME
+    del sys.argv[1]
 elif sys.argv[1] == '-a':
-	itime = ST_CTIME
-	del sys.argv[1]
+    itime = ST_CTIME
+    del sys.argv[1]
 else:
-	itime = ST_MTIME
+    itime = ST_MTIME
 
-secs_per_year = 365.0 * 24.0 * 3600.0	# Scale factor
-now = time.time()			# Current time, for age computations
-status = 0				# Exit status, set to 1 on errors
+secs_per_year = 365.0 * 24.0 * 3600.0   # Scale factor
+now = time.time()                       # Current time, for age computations
+status = 0                              # Exit status, set to 1 on errors
 
 # Compute max file name length
 maxlen = 1
 for file in sys.argv[1:]:
-	if len(file) > maxlen: maxlen = len(file)
+    if len(file) > maxlen: maxlen = len(file)
 
 # Process each argument in turn
 for file in sys.argv[1:]:
-	try:
-		st = statfunc(file)
-	except os.error, msg:
-		sys.stderr.write('can\'t stat ' + `file` + ': ' + `msg` + '\n')
-		status = 1
-		st = ()
-	if st:
-		anytime = st[itime]
-		size = st[ST_SIZE]
-		age = now - anytime
-		byteyears = float(size) * float(age) / secs_per_year
-		print string.ljust(file, maxlen),
-		print string.rjust(`int(byteyears)`, 8)
+    try:
+        st = statfunc(file)
+    except os.error, msg:
+        sys.stderr.write('can\'t stat ' + `file` + ': ' + `msg` + '\n')
+        status = 1
+        st = ()
+    if st:
+        anytime = st[itime]
+        size = st[ST_SIZE]
+        age = now - anytime
+        byteyears = float(size) * float(age) / secs_per_year
+        print string.ljust(file, maxlen),
+        print string.rjust(`int(byteyears)`, 8)
 
 sys.exit(status)