Remove py3k deprecation warnings from these Unicode tools.
diff --git a/Tools/unicode/mkstringprep.py b/Tools/unicode/mkstringprep.py
index 2525f9e..99fcae7 100644
--- a/Tools/unicode/mkstringprep.py
+++ b/Tools/unicode/mkstringprep.py
@@ -1,7 +1,7 @@
 import re, unicodedata, sys
 
 if sys.maxunicode == 65535:
-    raise RuntimeError, "need UCS-4 Python"
+    raise RuntimeError("need UCS-4 Python")
 
 def gen_category(cats):
     for i in range(0, 0x110000):
@@ -63,14 +63,14 @@
     if m:
         if m.group(1) == "Start":
             if curname:
-                raise "Double Start",(curname, l)
+                raise RuntimeError("Double Start", (curname, l))
             curname = m.group(2)
             table = {}
             tables.append((curname, table))
             continue
         else:
             if not curname:
-                raise "End without start", l
+                raise RuntimeError("End without start", l)
             curname = None
             continue
     if not curname:
@@ -87,7 +87,7 @@
             try:
                 start, end = fields
             except ValueError:
-                raise "Unpacking problem", l
+                raise RuntimeError("Unpacking problem", l)
         else:
             start = end = fields[0]
         start = int(start, 16)
@@ -146,8 +146,7 @@
 name, table = tables[0]
 del tables[0]
 assert name == "B.1"
-table = table.keys()
-table.sort()
+table = sorted(table.keys())
 print """
 b1_set = """ + compact_set(table) + """
 def in_table_b1(code):
@@ -177,8 +176,7 @@
     if map(ord, unichr(k).lower()) != v:
         b3_exceptions[k] = u"".join(map(unichr,v))
 
-b3 = b3_exceptions.items()
-b3.sort()
+b3 = sorted(b3_exceptions.items())
 
 print """
 b3_exceptions = {"""
@@ -353,8 +351,7 @@
 del tables[0]
 assert name == "C.6"
 
-table = table.keys()
-table.sort()
+table = sorted(table.keys())
 
 print """
 c6_set = """ + compact_set(table) + """
@@ -367,8 +364,7 @@
 del tables[0]
 assert name == "C.7"
 
-table = table.keys()
-table.sort()
+table = sorted(table.keys())
 
 print """
 c7_set = """ + compact_set(table) + """
@@ -381,8 +377,7 @@
 del tables[0]
 assert name == "C.8"
 
-table = table.keys()
-table.sort()
+table = sorted(table.keys())
 
 print """
 c8_set = """ + compact_set(table) + """
@@ -395,8 +390,7 @@
 del tables[0]
 assert name == "C.9"
 
-table = table.keys()
-table.sort()
+table = sorted(table.keys())
 
 print """
 c9_set = """ + compact_set(table) + """