Fix lambda parameters being refered as arguments (GH-7037)

Doc/glossary.rst

@@ -627,7 +627,7 @@ Glossary
    lambda
       An anonymous inline function consisting of a single :term:`expression`
       which is evaluated when the function is called.  The syntax to create
-      a lambda function is ``lambda [arguments]: expression``
+      a lambda function is ``lambda [parameters]: expression``
 
    LBYL
       Look before you leap.  This coding style explicitly tests for

Doc/reference/expressions.rst

@@ -1608,12 +1608,12 @@ Lambdas
    lambda_expr_nocond: "lambda" [`parameter_list`]: `expression_nocond`
 
 Lambda expressions (sometimes called lambda forms) are used to create anonymous
-functions. The expression ``lambda arguments: expression`` yields a function
+functions. The expression ``lambda parameters: expression`` yields a function
 object.  The unnamed object behaves like a function object defined with:
 
 .. code-block:: none
 
-   def <lambda>(arguments):
+   def <lambda>(parameters):
        return expression
 
 See section :ref:`function` for the syntax of parameter lists.  Note that