docs/sys: Clarify description of sys.exit().

ad2889c1 · Paul Sokolovsky · 8ad1659f · ad2889c1
Commit ad2889c1 authored May 01, 2016 by Paul Sokolovsky
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docs/library/sys.rst docs/library/sys.rst +4 -3

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--- a/docs/library/sys.rst
+++ b/docs/library/sys.rst
@@ -7,10 +7,11 @@
 Functions
 ---------

-.. function:: exit([retval])
+.. function:: exit(retval=0)

-   Raise a ``SystemExit`` exception.  If an argument is given, it is the
-   value given to ``SystemExit``.
+   Terminate current program with a given exit code. Underlyingly, this
+   function raise as ``SystemExit`` exception. If an argument is given, its
+   value given as an argument to ``SystemExit``.

 .. function:: print_exception(exc, [file])