diff --git a/README.md b/README.md
index 7eb216e..de7d685 100644
--- a/README.md
+++ b/README.md
@@ -38,8 +38,17 @@ https://python-tcod.readthedocs.io/en/latest/
 ## Setup and Notes
 
 ```bash
+#make the virtual environment
 python3 -m venv venv
-./venv/bin/tcod
+
+#useful pre-commit hook
+lint_results=$(echo "$(grep -Pro '[\t]+$' */*.py)")
+lint_errors=$(echo "$lint_results" | wc -w)
+if [ $lint_errors -gt 0 ]; then
+	echo "pre-commit lint errors found: $lint_errors"
+	echo "$lint_results"
+fi
+exit $lint_errors
 ```
 
 heapq is a thing for the speed sorting
diff --git a/source/engine.py b/source/engine.py
index c45d031..55b2ee6 100644
--- a/source/engine.py
+++ b/source/engine.py
@@ -62,7 +62,7 @@ class Engine:
 			if entity.ai:
 				action = entity.ai.process()
 				result |= action.apply()
-		
+
 		return result
 
 	def handle_rendering(self, context: Context, console: Console) -> None:
diff --git a/source/entity.py b/source/entity.py
index 392f914..adbbed9 100644
--- a/source/entity.py
+++ b/source/entity.py
@@ -32,7 +32,7 @@ class Entity:
 		#monster-specific stuff
 		if ai_class:
 			self.ai: Optional[BaseAI] = ai_class(self)
-		
+
 		if stats:
 			self.stats = stats
 			self.stats.entity = self
@@ -49,7 +49,7 @@ class Entity:
 	def set_pos(self, x: int, y: int) -> None:
 		self.x = x
 		self.y = y
-	
+
 	#monster-specific stuff
 	def is_alive(self) -> bool:
 		return bool(self.ai)