Add Mark Summerfield.
diff --git a/Misc/developers.txt b/Misc/developers.txt
index d10563b..25d5324 100644
--- a/Misc/developers.txt
+++ b/Misc/developers.txt
@@ -112,6 +112,9 @@
- Jeffrey Yasskin was given SVN access on 9 August 2007 by NCN,
for his work on PEPs and other general patches.
+- Mark Summerfield was given SVN access on 1 August 2007 by GFB,
+ for work on documentation.
+
- Armin Ronacher was given SVN access on 23 July 2007 by GFB,
for work on the documentation toolset. He now maintains the
ast module.