Update signature style for optional arguments, part 3.
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst
index 856a9e4..c5a7ea8 100644
--- a/Doc/library/dis.rst
+++ b/Doc/library/dis.rst
@@ -30,22 +30,23 @@
The :mod:`dis` module defines the following functions and constants:
-.. function:: dis([bytesource])
+.. function:: dis(x=None)
- Disassemble the *bytesource* object. *bytesource* can denote either a module, a
+ Disassemble the *x* object. *x* can denote either a module, a
class, a method, a function, or a code object. For a module, it disassembles
all functions. For a class, it disassembles all methods. For a single code
sequence, it prints one line per bytecode instruction. If no object is
provided, it disassembles the last traceback.
-.. function:: distb([tb])
+.. function:: distb(tb=None)
Disassembles the top-of-stack function of a traceback, using the last traceback
if none was passed. The instruction causing the exception is indicated.
-.. function:: disassemble(code[, lasti])
+.. function:: disassemble(code, lasti=-1)
+ disco(code, lasti=-1)
Disassembles a code object, indicating the last instruction if *lasti* was
provided. The output is divided in the following columns:
@@ -62,12 +63,6 @@
constant values, branch targets, and compare operators.
-.. function:: disco(code[, lasti])
-
- A synonym for :func:`disassemble`. It is more convenient to type, and kept
- for compatibility with earlier Python releases.
-
-
.. function:: findlinestarts(code)
This generator function uses the ``co_firstlineno`` and ``co_lnotab``