exporter: Avoid trailing dots on bare-bone items

Some items are going to be really empty: just the title and the author;
no year, no notes, etc. In these cases the exporter still tried to add
this missing information.

Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/plain_exporter.rb b/lib/plain_exporter.rb
index 514d243..018c8f2 100644
--- a/lib/plain_exporter.rb
+++ b/lib/plain_exporter.rb
@@ -33,8 +33,11 @@ class PlainExporter < BaseExporter
       str += thing.note.present? ? "#{thing.note}. #{thing.publisher}" : thing.publisher
     end
 
+    str = str.strip
     if thing.address.present?
       str + ", #{thing.address}: #{thing.year}."
+    elsif str.blank?
+      nil
     else
       "#{str}."
     end