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>

2 files changed, 8 insertions, 1 deletions

diff --git a/lib/base_exporter.rb b/lib/base_exporter.rb
index f64301b..a67784e 100644
--- a/lib/base_exporter.rb
+++ b/lib/base_exporter.rb
@@ -59,7 +59,11 @@ class BaseExporter
   #
   # NOTE: the subclass *must* implement `parse_title`.
   def head(thing:)
-    str = "#{parse_authors(thing:)} (#{thing.year}). #{parse_title(title: thing.title)}."
+    str = if thing.year
+            "#{parse_authors(thing:)} (#{thing.year}). #{parse_title(title: thing.title)}."
+          else
+            "#{parse_authors(thing:)}. #{parse_title(title: thing.title)}."
+          end
 
     if thing.insideof.present?
       str += " #{inside_of(sub: thing.insideof)}"
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