The note mailer had a title with no translation. Removed as it was not very useful anyway...

app/views/note_mailer/create.text.haml

-=t '.title'
+= t '.body', subject: @note.event.title, contents: @note.contents
 \
-=t '.body', subject: @note.event.title, contents: @note.contents
-\ 
 = strip_tags @note.contents
 \
 = moderations_url
-\ 
-=t '.signature'
+\
+= t '.signature'