lint and section header

sources/manager_github.py

@@ -151,6 +151,6 @@ class GitHubManager:
 
         else:
             DBM.i("Inlining chart...")
-            hint = f"You can use [this website](https://codebeautify.org/base64-to-image-converter) to view the generated image."
+            hint = "You can use [this website](https://codebeautify.org/base64-to-image-converter) to view the generated base64 image."
             encoded_image = f"data:image/png;base64,{b64encode(data).decode('utf-8')}"
-            return f"<details>\n\t<summary>Base64 encoded image</summary>\n\t```\t\n{encoded_image}\t\n```</details>\n\n{hint}"
+            return f"<details>\n  <summary>{hint}</summary>\n  ```\n    {encoded_image}\n  ```</details>\n"