Add BDD test

tests/bdd/features/config_file.feature

@@ -106,3 +106,8 @@ Feature: Multiple journals
         And we use the config "basic_onefile.yaml"
         When we run "jrnl --cf empty_file.yaml"
         Then the error output should contain "Unable to parse config file"
+
+    Scenario: Use a config file with linewrap set to 'auto'
+        Given we use the config "linewrap_auto.yaml"
+        When we run "jrnl -1"
+        Then the output should contain "Life is good."

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