Fixed the problem with empty entries for apt_packages, adjusted tests

Author: h-chmeruk

template/.readthedocs.yml.jinja

@@ -13,7 +13,9 @@ build:
   {%- if apt_packages != "" %}
   apt_packages:
     {%- for package in apt_packages.split(',') %}
+    {%- if package.strip() != "" %}
     - {{ package.strip() }}
+    {%- endif %}
     {%- endfor %}
   {%- endif %}
 

tests/test_copier.py

@@ -177,7 +177,7 @@ def test_content_docs_multiple_files(default_project, file_name):
 
 @pytest.mark.parametrize("desired", [
     '  apt_packages:\n'
-    '    - libsndfile1',
+    '    - libsndfile1\n\n',
     '    python: "3.14"',
     "  include:\n    - path/to/submodule",
 ])