bpo-19184: Update the documentation of dis module. (GH-13652)
* bpo-19184: Update the documentation of dis module
* Explain the behavior of the number of arguments of RAISE_VARGARGS
opcode.
* bpo-19184: Update blurb.
* bpo-19184: Fix typo in the dis Documentation.
* bpo-19184: Address review comments and improve the doc
* bpo-19184: Remove news file.
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst
index 060d4bb..15e707a 100644
--- a/Doc/library/dis.rst
+++ b/Doc/library/dis.rst
@@ -1113,9 +1113,13 @@
.. opcode:: RAISE_VARARGS (argc)
- Raises an exception. *argc* indicates the number of arguments to the raise
- statement, ranging from 0 to 3. The handler will find the traceback as TOS2,
- the parameter as TOS1, and the exception as TOS.
+ Raises an exception using one of the 3 forms of the ``raise`` statement,
+ depending on the value of *argc*:
+
+ * 0: ``raise`` (re-raise previous exception)
+ * 1: ``raise TOS`` (raise exception instance or type at ``TOS``)
+ * 2: ``raise TOS1 from TOS`` (raise exception instance or type at ``TOS1``
+ with ``__cause__`` set to ``TOS``)
.. opcode:: CALL_FUNCTION (argc)