scripts: Adapt some docstrings

scripts/generate-frozen-requirements

@@ -29,7 +29,7 @@ class AppEnvBuilder(EnvBuilder):
         return builder
 
     def post_setup(self, context):
-        """Do post-setup operations like upgrade setuptools and pip, install the"""
+        """Do post-setup operations like upgrade setuptools and pip."""
         super().post_setup(context)
 
         self.context = context

scripts/list-apps

@@ -9,7 +9,7 @@ from common import APPS_DIR
 
 
 def list_apps():
-    """List all the known apps with a requirements.txt file"""
+    """List all known apps with a requirements.txt file"""
     for req_file in sorted(APPS_DIR.glob("*/requirements.txt")):
         yield req_file.parent.stem