Merged revisions 85768-85771,85773,85777,85823,85825 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r85768 | georg.brandl | 2010-10-21 14:59:14 +0200 (Do, 21 Okt 2010) | 1 line

  #9919: fix off-by-one error in lineno command in Misc/gdbinit; also add newline to its output.
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  r85769 | georg.brandl | 2010-10-21 15:01:23 +0200 (Do, 21 Okt 2010) | 1 line

  Fix missing import.
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  r85770 | georg.brandl | 2010-10-21 15:29:10 +0200 (Do, 21 Okt 2010) | 1 line

  #3077: fix h2py substitution of character literals.
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  r85771 | georg.brandl | 2010-10-21 15:34:51 +0200 (Do, 21 Okt 2010) | 1 line

  #1203650: allow larger list of files in windows makefile for freeze.
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  r85773 | georg.brandl | 2010-10-21 15:45:52 +0200 (Do, 21 Okt 2010) | 1 line

  #4829: better error message for invalid file mode
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  r85777 | georg.brandl | 2010-10-21 17:44:51 +0200 (Do, 21 Okt 2010) | 1 line

  Add .hgeol file for the Mercurial EOL extension.
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  r85823 | georg.brandl | 2010-10-24 16:32:45 +0200 (So, 24 Okt 2010) | 1 line

  Fix style.
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  r85825 | georg.brandl | 2010-10-24 17:16:02 +0200 (So, 24 Okt 2010) | 1 line

  Add documentation about the default warnings filters.
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diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index a685b13..83921ea 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -268,7 +268,8 @@
             if (rwa) {
             bad_mode:
                 PyErr_SetString(PyExc_ValueError,
-                                "Must have exactly one of read/write/append mode");
+                                "Must have exactly one of read/write/append "
+                                "mode and at most one plus");
                 goto error;
             }
             rwa = 1;