signal.c: signal list to kill

* signal.c (rb_f_kill): [DOC] mention known signal list.
  [ruby-core:66162] [Bug #10492]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48358 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Nov 10 16:09:43 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* signal.c (rb_f_kill): [DOC] mention known signal list.
+	  [ruby-core:66162] [Bug #10492]
+
 Mon Nov 10 14:17:58 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* lib/rdoc/*.rb: Update to RDoc 4.2.0.alpha(579a11c)

signal.c

@@ -374,6 +374,8 @@ static void signal_enque(int sig);
  *  a POSIX signal name (either with or without a +SIG+ prefix). If _signal_ is
  *  negative (or starts with a minus sign), kills process groups instead of
  *  processes. Not all signals are available on all platforms.
+ *  The keys and values of +Signal.list+ are known signal names and numbers,
+ *  respectively.
  *
  *     pid = fork do
  *        Signal.trap("HUP") { puts "Ouch!"; exit }