Fix extra newlines after installation blocks.

Author: domdfcoding

repo_helper/files/docs.py

@@ -716,7 +716,7 @@ def rewrite_docs_index(repo_path: pathlib.Path, templates: jinja2.Environment) -
 			templates.globals["on_pypi"],
 			templates.globals["pypi_name"],
 			templates.globals["conda_channels"],
-			)
+			) + "\n"
 
 	links_block = create_docs_links_block(
 			templates.globals["username"],

repo_helper/files/readme.py

@@ -78,7 +78,7 @@ def rewrite_readme(repo_path: pathlib.Path, templates: jinja2.Environment) -> Li
 			templates.globals["on_pypi"],
 			templates.globals["pypi_name"],
 			templates.globals["conda_channels"],
-			)
+			) + "\n"
 
 	readme = readme_file.read_text(encoding="UTF-8")
 	readme = shields_regex.sub(shields_block, readme)