style(css): Adjust argument styling and fix mypy warnings

- Increase .argparse-argument-name padding to .485rem .875rem
- Add .argparse-argument-help with padding-block-start for spacing
- Remove unused type: ignore comments in test_nodes.py

Author: tony

docs/_static/css/argparse-highlight.css

@@ -292,7 +292,7 @@ pre.argparse-usage {
 .argparse-argument-name {
     background: var(--argparse-code-background);
     border-radius: .2rem;
-    padding: .325rem .6rem;
+    padding: .485rem .875rem;
     font-family: var(--font-stack--monospace);
     width: fit-content;
 }
@@ -353,3 +353,11 @@ body:not([data-theme="dark"]) .argparse-argument-name .headerlink:hover:not(:vis
     color: #E5C07B;
     font-style: italic;
 }
+
+/*
+ * Help text description
+ * Adds spacing above for visual separation from argument name.
+ */
+.argparse-argument-help {
+    padding-block-start: 0.5rem;
+}

tests/docs/_ext/sphinx_argparse_neo/test_nodes.py

@@ -430,8 +430,8 @@ def render_argument_to_html(
     node["id_prefix"] = id_prefix
 
     translator = MockTranslator()
-    visit_argparse_argument_html(translator, node)  # type: ignore[arg-type]
-    depart_argparse_argument_html(translator, node)  # type: ignore[arg-type]
+    visit_argparse_argument_html(translator, node)
+    depart_argparse_argument_html(translator, node)
 
     return "".join(translator.body)