doc/rust.md: Missing in keyword on keyword list.

toqueteos · toqueteos · commit c7a269fedc74 · 2013-08-30T13:21:14.000+02:00
diff --git a/doc/rust.md b/doc/rust.md
@@ -209,7 +209,7 @@ break
 do
 else enum extern
 false fn for
-if impl
+if impl in
 let loop
 match mod mut
 priv pub
