Help: Use "^^^^" for subsubsection headers

This is the convention suggested in the Sphinx documentation and is
already used in several other places in the CMake documentation.
Update a few places where we were using other characters.

Help/command/cmake_policy.rst

@@ -18,7 +18,7 @@ setting is available the ``OLD`` behavior is assumed and a warning is
 produced requesting that the policy be set.
 
 Setting Policies by CMake Version
-'''''''''''''''''''''''''''''''''
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 The ``cmake_policy`` command is used to set policies to ``OLD`` or ``NEW``
 behavior.  While setting policies individually is supported, we
@@ -40,7 +40,7 @@ Note that the :command:`cmake_minimum_required(VERSION)`
 command implicitly calls ``cmake_policy(VERSION)`` too.
 
 Setting Policies Explicitly
-'''''''''''''''''''''''''''
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 ::
 
@@ -54,7 +54,7 @@ one may fix the project to work with the new behavior and set the
 policy state to ``NEW``.
 
 Checking Policy Settings
-''''''''''''''''''''''''
+^^^^^^^^^^^^^^^^^^^^^^^^
 
 ::
 
@@ -65,7 +65,7 @@ The output ``<variable>`` value will be ``OLD`` or ``NEW`` if the
 policy is set, and empty otherwise.
 
 CMake Policy Stack
-''''''''''''''''''
+^^^^^^^^^^^^^^^^^^
 
 CMake keeps policy settings on a stack, so changes made by the
 cmake_policy command affect only the top of the stack.  A new entry on

Help/manual/cmake-buildsystem.7.rst

@@ -551,7 +551,7 @@ exporting see the :manual:`cmake-packages(7)` manual.
 .. _`Include Directories and Usage Requirements`:
 
 Include Directories and Usage Requirements
-''''''''''''''''''''''''''''''''''''''''''
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Include directories require some special consideration when specified as usage
 requirements and when used with generator expressions.  The

Help/manual/cmake-developer.7.rst

@@ -808,7 +808,7 @@ Documentation`_ section above.
 
 
 Standard Variable Names
-~~~~~~~~~~~~~~~~~~~~~~~
+^^^^^^^^^^^^^^^^^^^^^^^
 
 For a ``FindXxx.cmake`` module that takes the approach of setting
 variables (either instead of or in addition to creating imported
@@ -914,7 +914,7 @@ them.
 
 
 A Sample Find Module
-~~~~~~~~~~~~~~~~~~~~
+^^^^^^^^^^^^^^^^^^^^
 
 We will describe how to create a simple find module for a library
 ``Foo``.

Help/manual/cmake-qt.7.rst

@@ -54,7 +54,7 @@ CMake.  Target dependencies may be added to that custom target by adding them
 to the :prop_tgt:`AUTOGEN_TARGET_DEPENDS` target property.
 
 AUTOMOC
-'''''''
+^^^^^^^
 
 The :prop_tgt:`AUTOMOC` target property controls whether :manual:`cmake(1)`
 inspects the C++ files in the target to determine if they require ``moc`` to
@@ -84,7 +84,7 @@ variable may be populated to pre-set the options for all following targets.
 .. _`Qt AUTOUIC`:
 
 AUTOUIC
-'''''''
+^^^^^^^
 
 The :prop_tgt:`AUTOUIC` target property controls whether :manual:`cmake(1)`
 inspects the C++ files in the target to determine if they require ``uic`` to
@@ -147,7 +147,7 @@ result of linking with the :prop_tgt:`IMPORTED` target:
 .. _`Qt AUTORCC`:
 
 AUTORCC
-'''''''
+^^^^^^^
 
 The :prop_tgt:`AUTORCC` target property controls whether :manual:`cmake(1)`
 creates rules to execute ``rcc`` at the appropriate time on source files