* lib/pp.rb (pp): return nil like p.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@2279 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 6 insertions, 2 deletions

diff --git a/lib/pp.rb b/lib/pp.rb
index 0a18a6f31..1698084e6 100644
--- a/lib/pp.rb
+++ b/lib/pp.rb
@@ -55,6 +55,8 @@ I like the latter.  If you do too, this library is for you.
 : pp(obj)
     output ((|obj|)) to (({$>})) in pretty printed format.
 
+    It returns (({nil})).
+
 == Customized output
 To define your customized pretty printing function for your class,
 redefine a method (({pretty_print(((|pp|)))})) in the class.
@@ -110,6 +112,7 @@ module Kernel
     objs.each {|obj|
       PP.pp(obj)
     }
+    nil
   end
 end
 
diff --git a/lib/tsort.rb b/lib/tsort.rb
index 58e073dff..2c3c4b2c4 100644
--- a/lib/tsort.rb
+++ b/lib/tsort.rb
@@ -55,7 +55,7 @@ TSort uses Hash internally.
 
 --- strongly_connected_components
     returns strongly connected components as an array of array of nodes.
-    The array is sorted as children to parents.
+    The array is sorted from children to parents.
     Each elements of the array represents a strongly connected component.
 
 --- each_strongly_connected_component {|nodes| ...}
@@ -114,7 +114,8 @@ Very simple `make' like tool can be implemented as follows:
             outputs_time = nil
           end
           if outputs_time == nil ||
-             inputs_time != nil && outputs_time < inputs_time # `<=' is better?
+             inputs_time != nil && outputs_time <= inputs_time
+            sleep 1 if inputs_time != nil && inputs_time.to_i == Time.now.to_i
             block.call
           end
         end