Enable ruff rule flake8-executable (EXE)

See: https://docs.astral.sh/ruff/rules/#flake8-executable-exe

Silence the following new warnings:
lieer/nobar.py:1:1: EXE001 Shebang is present but file is not executable

.ruff.toml

@@ -34,7 +34,7 @@ target-version = "py39"
 # Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`)  codes by default.
 # Unlike Flake8, Ruff doesn't enable pycodestyle warnings (`W`) or
 # McCabe complexity (`C901`) by default.
-select = ["E4", "E7", "E9", "F", "I", "UP", "C4", "SIM", "PERF"]
+select = ["E4", "E7", "E9", "F", "I", "UP", "C4", "EXE", "SIM", "PERF"]
 ignore = [
     "E501",  # Line too long
     "E741",  # Ambiguous variable name: `l`

lieer/nobar.py

@@ -1,5 +1,3 @@
-#! /usr/bin/env python3
-#
 # Regular non-TTY drop-in replacement for tqdm
 #
 # Copyright © 2020  Gaute Hope <[email protected]>