Some manual .format() -> f-strings

testing/resources/stdout_stderr_repo/stdout-stderr-entry

@@ -1,13 +1,7 @@
-#!/usr/bin/env python
-import sys
-
-
-def main():
-    for i in range(6):
-        f = sys.stdout if i % 2 == 0 else sys.stderr
-        f.write(f'{i}\n')
-        f.flush()
-
-
-if __name__ == '__main__':
-    exit(main())
+#!/usr/bin/env bash
+echo 0
+echo 1 1>&2
+echo 2
+echo 3 1>&2
+echo 4
+echo 5 1>&2

testing/resources/stdout_stderr_repo/tty-check-entry

@@ -1,12 +1,11 @@
-#!/usr/bin/env python
-import sys
-
-
-def main():
-    print('stdin: {}'.format(sys.stdin.isatty()))
-    print('stdout: {}'.format(sys.stdout.isatty()))
-    print('stderr: {}'.format(sys.stderr.isatty()))
-
-
-if __name__ == '__main__':
-    exit(main())
+#!/usr/bin/env bash
+t() {
+    if [ -t "$1" ]; then
+        echo "$2: True"
+    else
+        echo "$2: False"
+    fi
+}
+t 0 stdin
+t 1 stdout
+t 2 stderr