Add missing parenthesis in 7.3.1 Setting up maildir shortcuts example
Fix contradictory example in 6.6 Queuing mail
Merge pull request #386 from ayanes/master

* mu4e: fix errors in documentation
Merge pull request #387 from thierryvolpiatto/master

* mu4e: fully fix last pull request about `mu4e~fontify-cited`
* mu4e: make sure the signature gets insert at the right places (Fixes #381)