Merge from 3.3: add links and index entries for "argument" and "parameter."

This adds to the work done for issue #15990 (i.e. f44b8d69e5fc and the
commits referenced there).

2 files changed, 21 insertions, 11 deletions

diff --git a/Doc/reference/compound_stmts.rst b/Doc/reference/compound_stmts.rst
index 6889176..d0d0646 100644
--- a/Doc/reference/compound_stmts.rst
+++ b/Doc/reference/compound_stmts.rst
@@ -417,6 +417,9 @@ is equivalent to ::
       statement.
 
 
+.. index::
+   single: parameter; function definition
+
 .. _function:
 .. _def:
 
@@ -478,11 +481,14 @@ is equivalent to ::
    def func(): pass
    func = f1(arg)(f2(func))
 
-.. index:: triple: default; parameter; value
+.. index::
+   triple: default; parameter; value
+   single: argument; function definition
 
-When one or more parameters have the form *parameter* ``=`` *expression*, the
-function is said to have "default parameter values."  For a parameter with a
-default value, the corresponding argument may be omitted from a call, in which
+When one or more :term:`parameters <parameter>` have the form *parameter* ``=``
+*expression*, the function is said to have "default parameter values."  For a
+parameter with a default value, the corresponding :term:`argument` may be
+omitted from a call, in which
 case the parameter's default value is substituted.  If a parameter has a default
 value, all following parameters up until the "``*``" must also have a default
 value --- this is a syntactic restriction that is not expressed by the grammar.
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index e9bf5c5..f88709e 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -637,17 +637,18 @@ upper bound and stride, respectively, substituting ``None`` for missing
 expressions.
 
 
+.. index::
+   object: callable
+   single: call
+   single: argument; call semantics
+
 .. _calls:
 
 Calls
 -----
 
-.. index:: single: call
-
-.. index:: object: callable
-
-A call calls a callable object (e.g., a function) with a possibly empty series
-of arguments:
+A call calls a callable object (e.g., a :term:`function`) with a possibly empty
+series of :term:`arguments <argument>`:
 
 .. productionlist::
    call: `primary` "(" [`argument_list` [","] | `comprehension`] ")"
@@ -665,11 +666,14 @@ of arguments:
 A trailing comma may be present after the positional and keyword arguments but
 does not affect the semantics.
 
+.. index::
+   single: parameter; call semantics
+
 The primary must evaluate to a callable object (user-defined functions, built-in
 functions, methods of built-in objects, class objects, methods of class
 instances, and all objects having a :meth:`__call__` method are callable).  All
 argument expressions are evaluated before the call is attempted.  Please refer
-to section :ref:`function` for the syntax of formal parameter lists.
+to section :ref:`function` for the syntax of formal :term:`parameter` lists.
 
 .. XXX update with kwonly args PEP