Issue #17047: remove doubled words found in 2.7 to 3.4 Modules/*,
as reported by Serhiy Storchaka and Matthew Barnett.
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 8b17ecd..ae89797 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -75,7 +75,7 @@
 PyDoc_STRVAR(iobase_seek_doc,
     "Change stream position.\n"
     "\n"
-    "Change the stream position to byte offset offset. offset is\n"
+    "Change the stream position to the given byte offset. The offset is\n"
     "interpreted relative to the position indicated by whence.  Values\n"
     "for whence are:\n"
     "\n"