[PATCH] [BZ#13542] Fix description of carg branch cut

[Allan McRae]

This documentation patch has been sitting in bugzilla for a while. I
have verified that the updated description is correct.

I grabbed the name and email address for the changelog from the bugzilla
account and will commit using the --author flag.  Anything else I am
missing?


2012-09-05  John Tobey  <john.tobey@gmail.com>

	[BZ #13542]
	* manual/arith.texi (Operations on Complex): Fix description
	of carg branch cut.


diff --git a/manual/arith.texi b/manual/arith.texi
index 572808c..3f4e56a 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -1966,10 +1966,10 @@ negated imaginary part.  In other words,
@samp{conj(a + bi) = a + -bi}.
 These functions return the argument of the complex number @var{z}.
 The argument of a complex number is the angle in the complex plane
 between the positive real axis and a line passing through zero and the
-number.  This angle is measured in the usual fashion and ranges from
@math{0}
-to @math{2@pi{}}.
+number.  This angle is measured in the usual fashion and ranges from
+@math{-@pi{}} to @math{@pi{}}.

-@code{carg} has a branch cut along the positive real axis.
+@code{carg} has a branch cut along the negative real axis.
 @end deftypefun

 @comment complex.h