Merge pull request #278 from pcarranza/master

Added how to ignore history appending for zsh

docs/encryption.rst

@@ -30,7 +30,12 @@ A note on security
 
 While jrnl follows best practises, true security is an illusion. Specifically, jrnl will leave traces in your memory and your shell history -- it's meant to keep journals secure in transit, for example when storing it on an `untrusted <http://techcrunch.com/2014/04/09/condoleezza-rice-joins-dropboxs-board/>`_ services such as Dropbox. If you're concerned about security, disable history logging for journal in your ``.bashrc`` ::
 
-    HISTINGNORE="jrnl *"
+    HISTIGNORE="jrnl *"
+
+If you are using zsh instead of bash, you can get the same behaviour adding this to your ``zshrc`` ::
+
+    setopt HIST_IGNORE_SPACE
+    alias jrnl=" jrnl"
 
 Manual decryption
 -----------------