-When the cursor is on an attachment button the key 's' can be used
-to save the attachment, the key 'v' to view the attachment in the
-default mailcap application, and the key 'o' prompts the user for an
-application to use to open the attachment. By default Enter or mouse
-button 1 saves the attachment but this is customisable (option
-Notmuch Show Part Button Default Action).
+ When the cursor is on an attachment button the key 's' can be used
+ to save the attachment, the key 'v' to view the attachment in the
+ default mailcap application, and the key 'o' prompts the user for an
+ application to use to open the attachment. By default Enter or mouse
+ button 1 saves the attachment but this is customisable (option
+ Notmuch Show Part Button Default Action).