Document the use of ... for :literal:...

Requrested by @jwrober.

docs/Developing/style-guide.rst

@@ -6,9 +6,9 @@ Documentation Style Guide
 .. role:: improvement
 .. role:: wonder
 
-The Longturn community uses the Python based Sphinx system to generate the documentation available on this 
-website and in the :file:`doc` directory in the released tarball. Sphinx takes plain text files formatted 
-with a superset of markdown called reStructuredText (ReST). Sphinx reStructuredText is documented here: 
+The Longturn community uses the Python based Sphinx system to generate the documentation available on this
+website and in the :file:`doc` directory in the released tarball. Sphinx takes plain text files formatted
+with a superset of markdown called reStructuredText (ReST). Sphinx reStructuredText is documented here:
 https://www.sphinx-doc.org/en/master/usage/restructuredtext/index.html
 
 This style guide is mostly meant for documentation authors to ensure that we keep a consistent look and feel
@@ -19,7 +19,7 @@ Headings
 
 Headings create chapter breaks between sections of a document as well as provide the title.
 
-Heading 1 
+Heading 1
     Heading 1 is used to for the title of the page/document.  The asterisk is used to denote Heading 1 like
     this:
 
@@ -53,31 +53,31 @@ Heading 3
 Interpreted Text Roles
 ======================
 
-Interpreted text roles are special code blocks that are inserted in line with regular text to create user 
-interface markup elements to bring attention to something or make it more obvious to the reader what you 
-want to do. Interpreted text roles are simply a code word surrounded by a colon on both sides and the text 
+Interpreted text roles are special code blocks that are inserted in line with regular text to create user
+interface markup elements to bring attention to something or make it more obvious to the reader what you
+want to do. Interpreted text roles are simply a code word surrounded by a colon on both sides and the text
 you want to alter is placed inside back-ticks.
 
-* :literal:`:doc:` -- Doc is used to create a hyperlink reference between documents in the documentation 
+* :literal:`:doc:` -- Doc is used to create a hyperlink reference between documents in the documentation
   system.
 * :literal:`:emphasis:` -- Emphasis is used to :emphasis:`bring attention to something`.
 * :literal:`:file:` -- File is used for file names and paths such as :file:`~/.local/share/freeciv21/saves`
-* :literal:`:guilabel:` -- GUI Label is used to bring attention to someting on the screen like the 
+* :literal:`:guilabel:` -- GUI Label is used to bring attention to someting on the screen like the
   :guilabel:`Next` button on the installer wizard
-* :literal:`:literal:` -- Literal is used when you want to note a text element in its raw form. 
-* :literal:`:menuselection:` -- Menu Selection is used to give the path of menu clicks such as 
-  :menuselection:`Game --> Options --> Local Options`. To create the arrow character in between the options 
+* :literal:`:literal:` -- Literal is used when you want to note a text element in its raw form. This is equivalent to using four back-ticks: ````text````.
+* :literal:`:menuselection:` -- Menu Selection is used to give the path of menu clicks such as
+  :menuselection:`Game --> Options --> Local Options`. To create the arrow character in between the options
   you will place a text arrow like this: :literal:`-->` in between the selection items.
 * :literal:`:strong:` -- Strong is used to :strong:`bold some text`.
-* :literal:`:title-reference:` -- Title Reference is used notate a :title-reference:`title entry` in the 
-  in-game help or to refer to a page in the documentation without giving an actual hyperlink reference 
+* :literal:`:title-reference:` -- Title Reference is used notate a :title-reference:`title entry` in the
+  in-game help or to refer to a page in the documentation without giving an actual hyperlink reference
   (see :literal:`:doc:` above).
 
 The docutils specification allows for custom Interpreted Text Roles and we use this feature. The docutils
-documentation on this feature is available here: 
+documentation on this feature is available here:
 https://docutils.sourceforge.io/docs/ref/rst/directives.html#custom-interpreted-text-roles
 
-* :literal:`:unit:` -- This provides an opportunity to highlight a Freeciv21 unit, such as the 
+* :literal:`:unit:` -- This provides an opportunity to highlight a Freeciv21 unit, such as the
   :unit:`Musketeer`
 * :literal:`:improvement:` -- This provides an opportunity to highlight a Freeciv21 building or city
   improvement, such as the :improvement:`Granary`.
@@ -87,17 +87,17 @@ https://docutils.sourceforge.io/docs/ref/rst/directives.html#custom-interpreted-
 Admonition Directives
 =====================
 
-Admonitions are specially marked "topics" that can appear anywhere an ordinary body element can. Typically, 
-an admonition is rendered as an offset block in a document, sometimes outlined or shaded, with a title 
+Admonitions are specially marked "topics" that can appear anywhere an ordinary body element can. Typically,
+an admonition is rendered as an offset block in a document, sometimes outlined or shaded, with a title
 matching the admonition type. We use some of the standard admonitions in our documentation as well.
 
-* :literal:`.. attention::` -- Use attention to bring a very important high profile item to the reader's 
+* :literal:`.. attention::` -- Use attention to bring a very important high profile item to the reader's
   attention.
 
 .. attention::
     This is a really important message! Don't forget to eat breakfast every day.
 
-* :literal:`.. todo::` -- Use To Do as a reminder for documentation editors to come back and fix things at 
+* :literal:`.. todo::` -- Use To Do as a reminder for documentation editors to come back and fix things at
   a later date.
 
 .. todo::
@@ -108,7 +108,7 @@ matching the admonition type. We use some of the standard admonitions in our doc
 .. note::
     It's important to note that Freeciv21 is really fun to play with group's of people online.
 
-* :literal:`.. code-block:: rst` -- The code block is an excellent way to display actual code or any 
+* :literal:`.. code-block:: rst` -- The code block is an excellent way to display actual code or any
   pre-formatted plain text.
 
 .. code-block:: rst