Typo fix

Docker-DCO-1.1-Signed-off-by: Tom Fotherby <github@tomfotherby.com> (github: tomfotherby)

docs/sources/userguide/dockervolumes.md

@@ -84,7 +84,7 @@ history of the commands typed while in the container.
 
 > **Note:** 
 > Many tools used to edit files including `vi` and `sed --in-place` may result 
-> in a inode change. Since docker v1.1.0 this will produce a error such as
+> in an inode change. Since docker v1.1.0 this will produce an error such as
 > "*sed: cannot rename ./sedKdJ9Dy: Device or resource busy*". In the case where 
 > you want to edit the mounted file, it is often easiest to instead mount the 
 > parent directory.