Fixed unicode bug on Windows in pyscript command

Without using the repr representation of the path, "C:\Users" treats \U as a Unicode Escape.

To fix this, pyscript passes the repr representation of the path to do_py.

Author: tleonhardt

cmd2.py

@@ -1421,7 +1421,7 @@ def do_pyscript(self, arg, opts=None):
             arg = shlex.split(arg, posix=POSIX_SHLEX)
 
         # Get the absolute path of the script
-        script_path = os.path.abspath(os.path.expanduser(arg[0]))
+        script_path = os.path.expanduser(arg[0])
 
         # Save current command line arguments
         orig_args = sys.argv
@@ -1430,8 +1430,9 @@ def do_pyscript(self, arg, opts=None):
         sys.argv = [script_path]
         sys.argv.extend(arg[1:])
 
-        # Run the script
-        self.do_py("run('{}')".format(script_path))
+        # Run the script - use repr formatting to escape things which need to be escaped to prevent issues on Windows
+        py_cmd = "run({!r})".format(script_path)
+        self.do_py(py_cmd)
 
         # Restore command line arguments to original state
         sys.argv = orig_args