[#436] Adapt rake task to also clean trailing whitespace

lib/tasks/code.rake

@@ -14,14 +14,20 @@
 namespace :code do
   desc "Fix line endings of all source files"
   task :fix_line_endings do
-    unless `which fromdos`.present?
-      raise "fromdos command not found"
-    end
-    
-    Dir['**/**{.rb,.html.erb,.rhtml,.rjs,.rsb,.plain.erb,.rxml,.yml,.rake,.eml}'].each do |file_name|
-      next if file_name.include?("vendor")
-      system("fromdos #{file_name}")
-    end
+    Dir.chdir(File.join(File.dirname(__FILE__), "../..")) do
+      files = Dir['**/**{.rb,.html.erb,.rhtml,.rjs,.rsb,.plain.erb,.rxml,.yml,.rake,.eml}']
+      files.reject!{ |f|
+        f.include?("vendor") ||
+        f.include?("lib/SVG") ||
+        f.include?("lib/faster_csv") ||
+        f.include?("lib/redcloth") ||
+        f.include?("lib/diff")
+      }
 
+      # handle files in chunks of 50 to avoid too long command lines
+      while (slice = files.slice!(0, 50)).present?
+        system('ruby', '-i', '-pe', 'gsub(/\s+$/,"\n")', *slice)
+      end
+    end
   end
 end