Fix grains endline

linux/files/sphinx.grain

@@ -6,4 +6,4 @@ sphinx_doc:
 {%- macro indent_grains_dict() %}{% include grains_fragment_file %}{% endmacro %}
 {{ indent_grains_dict()|indent(4, true) }}
 {%- endif %}
-{%- endfor %}
+{%- endfor %}