Fix tc docstring

tasks.py

@@ -53,7 +53,7 @@ def populate(c):
 
 @task
 def tc(c):
-    """Populate the test database with fake-ish data"""
+    """Typecheck with mypy"""
     c.run("MYPYPATH=$(pwd)/stubs poetry run mypy lc/*.py tests/*.py scripts/*.py")