diff --git a/README.md b/README.md
index 6bc4486..cae0470 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ cd rendergit
 pip install -e .
 ```
 
-Now you can just `rendergit` any GitHub url e.g.:
+Now you can just `rendergit` any GitHub URL, e.g.:
 
 ```bash
 rendergit https://github.com/karpathy/nanoGPT
@@ -29,7 +29,7 @@ Once open, you can toggle between two views:
 - **👤 Human View**: Browse with syntax highlighting, sidebar navigation, visual goodies
 - **🤖 LLM View**: Copy the entire codebase as CXML text to paste into Claude, ChatGPT, etc.
 
-There's a few other smaller options, see the code.
+There are a few other smaller options; see the code.
 
 ## Features
 
diff --git a/repo_to_single_page.py b/repo_to_single_page.py
index b5d966b..ed4eb6c 100644
--- a/repo_to_single_page.py
+++ b/repo_to_single_page.py
@@ -149,7 +149,6 @@ def collect_files(repo_root: pathlib.Path, max_bytes: int) -> List[FileInfo]:
 def generate_tree_fallback(root: pathlib.Path) -> str:
     """Minimal tree-like output if `tree` command is missing."""
     lines: List[str] = []
-    prefix_stack: List[str] = []
 
     def walk(dir_path: pathlib.Path, prefix: str = ""):
         entries = [e for e in dir_path.iterdir() if e.name != ".git"]