Bug 1609943 - Move mode line section from C++ to general coding style. r=sylvestre

Differential Revision: https://phabricator.services.mozilla.com/D60262

--HG--
extra : moz-landing-system : lando

tools/lint/docs/coding-style/coding_style_cpp.rst

@@ -30,24 +30,6 @@ Unix-style linebreaks (``\n``), not Windows-style (``\r\n``). You can
 convert patches, with DOS newlines to Unix via the ``dos2unix`` utility,
 or your favorite text editor.
 
-Mode line
-~~~~~~~~~
-
-Files should have Emacs and vim mode line comments as the first two
-lines of the file, which should set ``indent-tabs-mode`` to ``nil``. For new
-files, use the following, specifying two-space indentation:
-
-.. code-block:: cpp
-
-   /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-   /* vim: set ts=8 sts=2 et sw=2 tw=80: */
-   /* This Source Code Form is subject to the terms of the Mozilla Public
-    * License, v. 2.0. If a copy of the MPL was not distributed with this
-    * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
-
-Be sure to use the correct ``Mode`` in the first line, don't use ``C++`` in
-JavaScript files.
-
 
 Additional rules
 ----------------

tools/lint/docs/coding-style/coding_style_general.rst

@@ -16,3 +16,21 @@ Coding style - General practices
 -  For new files, be sure to use the right `license
    boilerplate <https://www.mozilla.org/MPL/headers/>`__, per our
    `license policy <https://www.mozilla.org/MPL/license-policy.html>`__.
+
+Mode line
+~~~~~~~~~
+
+Files should have Emacs and vim mode line comments as the first two
+lines of the file, which should set ``indent-tabs-mode`` to ``nil``. For new
+files, use the following, specifying two-space indentation:
+
+.. code-block:: cpp
+
+   /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+   /* vim: set ts=8 sts=2 et sw=2 tw=80: */
+   /* This Source Code Form is subject to the terms of the Mozilla Public
+    * License, v. 2.0. If a copy of the MPL was not distributed with this
+    * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+Be sure to use the correct ``Mode`` in the first line, don't use ``C++`` in
+JavaScript files.