Issue #17047: remove doubled words found in 2.7 to 3.4 Lib/*,
as reported by Serhiy Storchaka and Matthew Barnett.
diff --git a/Lib/distutils/command/install.py b/Lib/distutils/command/install.py
index f1f3bd5..b9f1c6c 100644
--- a/Lib/distutils/command/install.py
+++ b/Lib/distutils/command/install.py
@@ -265,8 +265,8 @@
 
         if self.user and (self.prefix or self.exec_prefix or self.home or
                 self.install_base or self.install_platbase):
-            raise DistutilsOptionError("can't combine user with with prefix/"
-                                       "exec_prefix/home or install_(plat)base")
+            raise DistutilsOptionError("can't combine user with prefix, "
+                                       "exec_prefix/home, or install_(plat)base")
 
         # Next, stuff that's wrong (or dubious) only on certain platforms.
         if os.name != "posix":