Update Complex#finite? documentation

to state what it really does.

[Fix GH-1848]

From: Christian Bruckmayer <cbruckmayer@suse.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62920 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/complex.c b/complex.c
index bedc99f38e..c6daefdb99 100644
--- a/complex.c
+++ b/complex.c
@@ -1255,7 +1255,7 @@ nucomp_inspect(VALUE self)
  * call-seq:
  *    cmp.finite?  ->  true or false
  *
- * Returns +true+ if +cmp+'s magnitude is a finite number,
+ * Returns +true+ if +cmp+'s real and imaginary values are both finite numbers,
  * otherwise returns +false+.
  */
 static VALUE