Edit paragraph about PCK files in command line tutorial

getting_started/editor/command_line_tutorial.rst

@@ -293,9 +293,9 @@ will be shown.
 To export a debug version of the game, use the ``--export-debug`` switch
 instead of ``--export``. Their parameters and usage are the same.
 
-To export only a PCK file, use the ``--export-pack`` switch followed by the
-preset name and output path (with the file extension) instead of ``--export``.
-The output path extension determines whether it will be in PCK or ZIP format.
+To export only a PCK file, use the ``--export-pack`` option followed by the 
+preset name and output path, with the file extension, instead of ``--export``.
+The output path extension determines the package's format, either PCK or ZIP.
 
 Running a script
 ----------------