gh-91818: Use default program name in the CLI of many modules (GH-124867)

As argparse now detects by default when the code was run as a module.

This leads to using the actual executable name instead of simply "python"
to display in the usage message ("usage: python -m ...").

1 files changed, 1 insertions, 1 deletions

diff --git a/Lib/ast.py b/Lib/ast.py
index a954d4a..154d2c8 100644
--- a/Lib/ast.py
+++ b/Lib/ast.py
@@ -1743,7 +1743,7 @@ def unparse(ast_obj):
 def main():
     import argparse
 
-    parser = argparse.ArgumentParser(prog='python -m ast')
+    parser = argparse.ArgumentParser()
     parser.add_argument('infile', nargs='?', default='-',
                         help='the file to parse; defaults to stdin')
     parser.add_argument('-m', '--mode', default='exec',