Rewind tmpfile and skip empty lines

markdownrunner.py

@@ -139,8 +139,12 @@ def user_action(hunk: Sequence[Command], context=None) -> Sequence[Command]:
 			import subprocess
 			subprocess.run([editor, tmpfile.name])
 			# Read the file back
+			tmpfile.file.seek(0)
 			new_hunk = []
 			for line in tmpfile.file.readlines():
+				line = line.strip()
+				if line == '':
+					continue
 				parts = line.split('\t', maxsplit=2)
 				new_hunk.append(Command(user=parts[0],directory=parts[1],command=parts[2],context=None))
 		# Python has no goto for restarting, but we can recurse