Add linewrap option 'auto' (#1507)

* Add linewrap option 'auto'

* Specify the exception thrown

* Add BDD test

* Specify name instead of number

* Create test for linewrap auto and fancy format

* Fix linewrap auto for fancy format

tests/data/configs/linewrap_auto.yaml

@@ -0,0 +1,17 @@
+default_hour: 9
+default_minute: 0
+editor: ""
+encrypt: false
+highlight: true
+journals:
+  default: features/journals/simple.journal
+linewrap: auto
+tagsymbols: "@"
+template: false
+timeformat: "%Y-%m-%d %H:%M"
+indent_character: "|"
+colors:
+  date: none
+  title: none
+  body: none
+  tags: none