Remove references to Rails versions.

There's no reason for guides to reference old behaviors. They should
be current as of the versions of Rails that they ship with, and including
older information just clutters thing.

I discussed this change with @fxn and he agrees.

1 files changed, 1 insertions, 1 deletions

diff --git a/guides/source/engines.md b/guides/source/engines.md
index f1e2780eae..116a7e67cd 100644
--- a/guides/source/engines.md
+++ b/guides/source/engines.md
@@ -35,7 +35,7 @@ Finally, engines would not have been possible without the work of James Adam, Pi
 Generating an engine
 --------------------
 
-To generate an engine with Rails 3.2, you will need to run the plugin generator and pass it options as appropriate to the need. For the "blorgh" example, you will need to create a "mountable" engine, running this command in a terminal:
+To generate an engine, you will need to run the plugin generator and pass it options as appropriate to the need. For the "blorgh" example, you will need to create a "mountable" engine, running this command in a terminal:
 
 ```bash
 $ rails plugin new blorgh --mountable