use gzip multi-arg support

Formula/cvs2svn.rb

@@ -16,7 +16,7 @@ class Cvs2svn <Formula
 
     system "python", "setup.py", "install", "--prefix=#{prefix}"
     system "make man"
-    man1.install [gzip('cvs2svn.1'), gzip('cvs2git.1'), gzip('cvs2bzr.1')]
+    man1.install gzip('cvs2svn.1', 'cvs2git.1', 'cvs2bzr.1')
     prefix.install %w[ BUGS CHANGES COMMITTERS HACKING
       cvs2bzr-example.options cvs2git-example.options cvs2hg-example.options
       cvs2svn-example.options contrib ]

Formula/mr.rb

@@ -8,7 +8,7 @@ class Mr <Formula
   def install
     system "make"
     bin.install ['mr', 'webcheckout']
-    man1.install [gzip('mr.1'), gzip('webcheckout.1')]
+    man1.install gzip('mr.1', 'webcheckout.1')
     (share+'mr').install Dir['lib/*']
   end
 end

Formula/scons.rb

@@ -7,7 +7,7 @@ class Scons <Formula
   version '2.0.1'
 
   def install
-    man1.install [gzip('scons-time.1'), gzip('scons.1'), gzip('sconsign.1')]
+    man1.install gzip('scons-time.1', 'scons.1', 'sconsign.1')
     system "python", "setup.py", "install",
                      "--prefix=#{prefix}",
                      "--standalone-lib",