Fix whitespace stripping in pyproject (#81)

Author: Cadair

{{ cookiecutter.package_name }}/pyproject.toml

@@ -54,7 +54,7 @@ include-package-data = true
 
 [tool.setuptools.packages.find]
 include = ["{{ cookiecutter.module_name }}*"]
-{% if cookiecutter.enable_dynamic_dev_versions == 'y' -%}
+{%- if cookiecutter.enable_dynamic_dev_versions == 'y' %}
 exclude = ["{{ cookiecutter.module_name }}._dev*"]
 {%- endif %}