cleaning up previous commits.

note that addition of new files under docs/source/lang/api and
docs/source/lang/cpp which were just copies of files in
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diff --git a/source/lang/switchcase.rst b/source/lang/switchcase.rst
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--- a/source/lang/switchcase.rst
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@@ -1,118 +0,0 @@
-.. highlight:: cpp
-
-.. _lang-switchcase:
-
-``switch``\ /\ ``case``
-=======================
-
-Like :ref:`if <lang-if>` statements, A ``switch`` statement controls
-program flow by allowing you to specify different code that should be
-executed under various cases.
-
-The general syntax looks like this::
-
-    switch (var) {
-    case val1:
-        // statements
-        break;
-    case val2:
-        // statements
-        break;
-    ...
-    default:
-        // statements
-    }
-
-Where ``var`` is a variable whose value to investigate, and the
-``val1``, ``val2`` after each ``case`` are constant values that
-``var`` might be.
-
-Description
------------
-
-A ``switch`` statement compares the value of a variable to the values
-specified in ``case`` statements. When a ``case`` statement is found
-whose value matches that of the variable, the code in that case
-statement is run.
-
-Here's a more concrete example::
-
-      switch (var) {
-      case 1:
-          doThing1();
-          break;
-      case 2:
-          doThing2();
-          break;
-      }
-      afterTheSwitch();
-
-In the above example, if ``var == 1``, then the code beginning on the
-line after ``case 1`` gets executed.  That is, if ``var`` is one,
-``doThing1()`` gets called first, and then the ``break`` statement is
-executed.
-
-The ``break`` keyword exits the ``switch`` statement, and is typically
-used at the end of each ``case``.  Since there is a ``break`` at the
-end of ``case 1``, the ``switch`` statement exits, and the next line
-to be run is the one which calls ``afterTheSwitch()``.
-
-Without a ``break``, the ``switch`` statement will continue executing
-the following ``case`` expressions ("falling-through") until a
-``break`` (or the end of the switch statement) is reached.  Let's
-pretend the ``switch`` looked like this instead::
-
-      switch (var) {
-      case 1:
-          doThing1();
-          // no break statement anymore
-      case 2:
-          doThing2();
-          break;
-      }
-      afterTheSwitch();
-
-Now, if ``var`` is one, ``doThing1()`` gets executed like before.
-However, without a ``break``, the code would continue to be executed
-line-by-line, so ``doThing2()`` would be called next.  At this point,
-a ``break`` has been reached, so the program continues by calling
-``afterTheSwitch()``.  This is usually not what you want, which is why
-each ``case`` usually has a ``break`` at the end.
-
-.. _lang-switchcase-default:
-
-Writing "``default:``" instead of a ``case`` statement allows you to
-specify what to do if none of the ``case`` statements matches.  Having
-a ``default`` is optional (you can leave it out), but if you have one,
-it must appear after all of the ``case`` statements.  Let's add a
-``default`` to the ``switch`` we've been discussing::
-
-      switch (var) {
-      case 1:
-          doThing1();
-          break;
-      case 2:
-          doThing2();
-          break;
-      default:
-          doSomethingElse();
-      }
-      afterTheSwitch();
-
-If ``var`` is one, then ``doThing1()`` gets called.  If ``var`` is
-two, ``doThing2()`` gets called.  If ``var`` is anything else,
-``doSomethingElse()`` gets called.  As stated above, a ``default`` is
-optional.  If you're missing one and none of the ``case`` statements
-match, the ``switch`` does nothing at all, as if it weren't there.
-
-``switch`` statements are often used with an :ref:`enum <lang-enum>`
-value as the variable to compare.  In this case, you can write down
-all of the values the ``enum`` takes as ``case`` statements, and be
-sure you've covered all the possibilities.
-
-See also:
----------
-
-- :ref:`if/else <lang-if>`
-
-.. include:: cc-attribution.txt