Don't require an end emphasis indicator at word end

In Finish if the emphasis ends at the end of the word then the end is
implicit and no indicator is required.

Well really this situation is not properly specified and we just assume
standard liblouis emphasis behaviour.

tests/yaml/fi_harness.yaml

@@ -101,9 +101,12 @@ tests:
     - ⠧⠁⠇⠞⠊⠕⠝⠨⠏⠜⠜⠨⠍⠊⠑⠎
     - typeform:
         italic: '       +++    '
-  - # Emphasis only at the end of a word
+  - # Emphasis only at the end of a word. Accroding to a Finish
+    # braille expert this case is not specified, i.e. whether an
+    # indicator is needed if the emphasis ends at word end. So we
+    # assume no indicator is needed
     - valtionpäämies
-    - ⠧⠁⠇⠞⠊⠕⠝⠏⠜⠜⠨⠍⠊⠑⠎⠨
+    - ⠧⠁⠇⠞⠊⠕⠝⠏⠜⠜⠨⠍⠊⠑⠎
     - typeform:
         italic: '          ++++'
   - # Emphasis at the beginning and the end of a word, but not in the middle