Help: Revise docs on Scripting Commands

Revise docs for all "Scripting Commands", except four find_XXX
that use a macro suite of their own.

* Take full advantage of the improved syntax highlighting.
* Make consequential use of <..> placeholders.
* Clarify things here and there in the text.

Specific improvements to some command docs:

* "math": Correct description of novel hexadecimal capability.
* "if", "foreach", "while": Provide link to "endif" etc
* "foreach", "while": Mention "break" and "continue".
* "foreach": Simplify explanation of ``RANGE`` and ``IN`` signatures;
   advise against negative arguments or reverse ranges (compare issue #18461)
* "endif", "endfunction" etc: Explain that the argument is optional and
   maintained for compatibility only

1 files changed, 6 insertions, 6 deletions

diff --git a/Help/command/get_cmake_property.rst b/Help/command/get_cmake_property.rst
index 497ab4e..58bf741 100644
--- a/Help/command/get_cmake_property.rst
+++ b/Help/command/get_cmake_property.rst
@@ -3,14 +3,14 @@ get_cmake_property
 
 Get a global property of the CMake instance.
 
-::
+.. code-block:: cmake
 
-  get_cmake_property(VAR property)
+  get_cmake_property(<var> <property>)
 
-Get a global property from the CMake instance.  The value of the property is
-stored in the variable ``VAR``.  If the property is not found, ``VAR``
-will be  set to "NOTFOUND".  See the :manual:`cmake-properties(7)` manual
-for available properties.
+Gets a global property from the CMake instance.  The value of
+the ``<property>`` is stored in the variable ``<var>``.
+If the property is not found, ``<var>`` will be set to ``"NOTFOUND"``.
+See the :manual:`cmake-properties(7)` manual for available properties.
 
 See also the :command:`get_property` command ``GLOBAL`` option.