README.md in trema-0.4.2 vs README.md in trema-0.4.3

@@ -29,11 +29,11 @@
 
 * Ruby 1.8.7 or higher
 * RubyGems 1.3.6 or higher
 * Ubuntu 13.04, 12.10, 12.04, 11.10, and 10.04 (i386/amd64, Desktop Edition)
 * Debian GNU/Linux 7.0 and 6.0 (i386/amd64)
-* Fedora 16 (i386/x86_64)
+* Fedora 16-19 (i386/x86_64)
 
 It may also run on other GNU/Linux distributions but is not tested and
 NOT SUPPORTED at this moment.
 
 
@@ -51,14 +51,14 @@
     (In Ubuntu or Debian GNU/Linux)
     $ sudo apt-get install gcc make ruby rubygems ruby-dev libpcap-dev libsqlite3-dev libglib2.0-dev
 
     (In Ubuntu 10.04)
     $ sudo apt-get install gcc make ruby rubygems ruby-dev libopenssl-ruby libpcap-dev libsqlite3-dev libglib2.0-dev
-    $ sudo gem install rubygems-update --version 2.0.8
+    $ sudo gem install rubygems-update
     $ sudo /var/lib/gems/1.8/bin/update_rubygems
 
-    (In Fedora 16)
+    (In Fedora 16-19)
     $ sudo yum install gcc make ruby rubygems ruby-devel libpcap-devel libsqlite3x-devel glib2-devel
 
 2.Install Trema at the command prompt:
 
     $ sudo gem install trema
@@ -92,16 +92,16 @@
 class MyController < Controller
   # handle Packet-In messages here.
   def packet_in datapath_id, message
     # ...
   end
-  
+
   # handle Flow-Removed messages here.
   def flow_removed datapath_id, message
     # ...
   end
-  
+
   # ...
 end
 ```
 
 * [switch_ready(datapath_id)](http://rubydoc.info/github/trema/trema/master/Trema/Controller:switch_ready)
@@ -129,11 +129,11 @@
   def packet_in datapath_id, message
     # ...
     send_flow_mod_add( datapath_id, ... )
     send_packet_out( datapath_id, ... )
   end
-  
+
   # ...
 end
 ```
 
 * [send_flow_mod_add(datapath_id, options)](http://rubydoc.info/github/trema/trema/master/Trema/Controller:send_flow_mod_add)
@@ -150,15 +150,15 @@
 class MyController < Controller
   def switch_ready datapath_id
     # send a FeaturesRequest message
     send_message datapath_id, FeaturesRequest.new
   end
-  
+
   def features_reply datapath_id, message
     # ...
   end
-  
+
   # ...
 end
 ```
 
 * [Trema::Hello](http://rubydoc.info/github/trema/trema/master/Trema/Hello)
@@ -192,11 +192,11 @@
   send_flow_mod_add(
     datapath_id,
     :match => Match.new( :in_port => message.in_port, ...)
     # ...
   )
-  
+
   # ...
 end
 ```
 
 Also there is a utility method called
@@ -210,10 +210,10 @@
   send_flow_mod_add(
     datapath_id,
     :match => ExactMatch.from( message )
     # ...
   )
-  
+
   # ...
 end
 ```
 
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