[Lockfile] Make the BUNDLED WITH section backwards compatible

lib/bundler/definition.rb

@@ -317,7 +317,7 @@ def to_lock
 
       # Record the version of Bundler that was used to create the lockfile
       out << "\nBUNDLED WITH\n"
-      out << "  #{lock_version}\n"
+      out << "   #{lock_version}\n"
 
       out
     end

lib/bundler/lockfile_parser.rb

@@ -179,7 +179,7 @@ def parse_platform(line)
     end
 
     def parse_bundled_with(line)
-      line = line.strip
+      line = line[3..-1]
       if Gem::Version.correct?(line)
         @bundler_version = Gem::Version.create(line)
       end

spec/commands/lock_spec.rb

@@ -49,7 +49,7 @@ def read_lockfile(file = "Gemfile.lock")
         with_license
 
       BUNDLED WITH
-        #{Bundler::VERSION}
+         #{Bundler::VERSION}
     L
   end
 

spec/install/gems/flex_spec.rb

@@ -269,7 +269,7 @@
         rack
 
       BUNDLED WITH
-        #{Bundler::VERSION}
+         #{Bundler::VERSION}
       L
     end
   end

spec/install/gems/install_if.rb

@@ -32,7 +32,7 @@
         thin
 
       BUNDLED WITH
-        1.9.4
+         #{Bundler::VERSION}
     L
   end
 end