Merge pull request #12855 from aathan/patch-12

Rephrase named vs unnamed parameters in function definitions (in control-structures.rst).

Author: Leo

docs/control-structures.rst

@@ -150,8 +150,8 @@ throws an exception or goes out of gas.
     use ``f.value(x).gas(g)()``. This was deprecated in Solidity 0.6.2 and is no
     longer possible since Solidity 0.7.0.
 
-Named Calls and Anonymous Function Parameters
----------------------------------------------
+Function Calls with Named Parameters
+------------------------------------
 
 Function call arguments can be given by name, in any order,
 if they are enclosed in ``{ }`` as can be seen in the following
@@ -176,11 +176,13 @@ parameters from the function declaration, but can be in arbitrary order.
 
     }
 
-Omitted Function Parameter Names
---------------------------------
+Omitted Names in Function Definitions
+-------------------------------------
 
-The names of unused parameters (especially return parameters) can be omitted.
-Those parameters will still be present on the stack, but they are inaccessible.
+The names of parameters and return values in the function declaration can be omitted.
+Those items with omitted names will still be present on the stack, but they are
+inaccessible by name. An omitted return value name
+can still return a value to the caller by use of the ``return`` statement.
 
 .. code-block:: solidity