Update documentation

Author: pablogsal

Doc/library/exceptions.rst

@@ -436,6 +436,18 @@ The following exceptions are the exceptions that are usually raised.
 
       The source code text involved in the error.
 
+   .. attribute:: end_lineno
+
+      Which line number in the file the error occurred ends in. This is
+      1-indexed: the first line in the file has a ``lineno`` of 1.
+
+   .. attribute:: end_offset
+
+      The column in the end line where the error occurred finishes. This is
+      1-indexed: the first character in the line has an ``offset`` of 1.
+
+   .. versionchanged:: 3.10
+      Added the :attr:`end_lineno` and :attr:`end_offset` attributes.
 
 .. exception:: IndentationError
 

Doc/whatsnew/3.10.rst

@@ -171,6 +171,31 @@ These improvements are inspired by previous work in the PyPy interpreter.
 (Contributed by Pablo Galindo in :issue:`42864` and Batuhan Taskaya in
 :issue:`40176`.)
 
+:exc:`SyntaxError` exceptions raised by the intepreter will now highlight the
+full error range of the expression that consistutes the syntax error itself,
+instead of just where the problem is detected. In this way, instead of displaying
+(before Python 3.10):
+
+.. code-block:: python
+
+    >>> foo(x, z for z in range(10), t, w)
+      File "<stdin>", line 1
+        foo(x, z for z in range(10), t, w)
+               ^
+    SyntaxError: Generator expression must be parenthesized
+
+now Python 3.10 will display the exception as:
+
+.. code-block:: python
+
+    >>> foo(x, z for z in range(10), t, w)
+      File "<stdin>", line 1
+        foo(x, z for z in range(10), t, w)
+               ^^^^^^^^^^^^^^^^^^^^
+    SyntaxError: Generator expression must be parenthesized
+
+This improvement has been contributed by Pablo Galindo in :issue:`43914`.
+
 A considerable amount of new specialized messages for :exc:`SyntaxError` exceptions
 have been incorporated. Some of the most notable ones: