gh-148315: Shell-quote the command line in pyvenv.cfg

The `command = ...` record written to `pyvenv.cfg` by
`venv.EnvBuilder.create_configuration` was assembled with a plain
`' '.join(args)` and an unquoted `sys.executable`. When any of these
tokens contained whitespace (for example a Windows user directory like
`C:\Users\Z B\...`), the recorded command was no longer a faithful
reproduction and truncated at the first space when shell-parsed.

Build the full argv as a list and emit it via `shlex.join`, and split
`--prompt="..."` into two separate argv tokens so its value is quoted
by `shlex.join` as well.

Author: pratyush618

Lib/venv/__init__.py

@@ -252,13 +252,16 @@ def create_configuration(self, context):
             if self.upgrade_deps:
                 args.append('--upgrade-deps')
             if self.orig_prompt is not None:
-                args.append(f'--prompt="{self.orig_prompt}"')
+                args.extend(['--prompt', self.orig_prompt])
             if not self.scm_ignore_files:
                 args.append('--without-scm-ignore-files')
 
             args.append(context.env_dir)
-            args = ' '.join(args)
-            f.write(f'command = {sys.executable} -m venv {args}\n')
+            # gh-148315: shell-quote so paths containing whitespace
+            # (e.g. a Windows user directory with a space) round-trip
+            # faithfully and the recorded command can be re-executed.
+            command = shlex.join([sys.executable, '-m', 'venv', *args])
+            f.write(f'command = {command}\n')
 
     def symlink_or_copy(self, src, dst, relative_symlinks_ok=False):
         """