Replace version strings with Version objects

Formula/bash.rb

@@ -10,7 +10,7 @@ class Bash < Formula
   depends_on 'readline'
 
   def patches
-    patch_level = version.split('.').last.to_i
+    patch_level = version.to_s.split('.').last.to_i
     {'p0' => (1..patch_level).map { |i| "http://ftpmirror.gnu.org/bash/bash-4.2-patches/bash42-%03d" % i }}
   end
 

Formula/lua.rb

@@ -53,7 +53,7 @@ class Lua < Formula
 
     # this ensures that this symlinking for lua starts at lib/lua/5.1 and not
     # below that, thus making luarocks work
-    (HOMEBREW_PREFIX/"lib/lua"/version.split('.')[0..1].join('.')).mkpath
+    (HOMEBREW_PREFIX/"lib/lua"/version.to_s.split('.')[0..1].join('.')).mkpath
 
     system "make", "macosx", "INSTALL_TOP=#{prefix}", "INSTALL_MAN=#{man1}"
     system "make", "install", "INSTALL_TOP=#{prefix}", "INSTALL_MAN=#{man1}"

Formula/shapelib.rb

@@ -25,7 +25,7 @@ class Shapelib < Formula
     include.install 'shapefil.h'
 
     cd lib do
-      ln_s "libshp.#{version}.dylib", "libshp.#{version.split('.').first}.dylib"
+      ln_s "libshp.#{version}.dylib", "libshp.#{version.to_s.split('.').first}.dylib"
       ln_s "libshp.#{version}.dylib", "libshp.dylib"
     end
   end

Formula/sip.rb

@@ -28,7 +28,7 @@ class Sip < Formula
     else
       sip_version = version
     end
-    inreplace 'build.py', /@SIP_VERSION@/, (sip_version.gsub '.', ',')
+    inreplace 'build.py', /@SIP_VERSION@/, (sip_version.to_s.gsub '.', ',')
 
     system "python", "build.py", "prepare"
     # Set --destdir such that the python modules will be in the HOMEBREWPREFIX/lib/pythonX.Y/site-packages