Preserve whitespace at the end of crontab contents (issue #95)

lib/whenever/command_line.rb

@@ -106,7 +106,11 @@ module Whenever
     end
     
     def prepare(contents)
-      contents.split("\n")[@options[:cut]..-1].join("\n")
+      # Some cron implementations require all non-comment lines to be newline-terminated.
+      # Preserve any whitespace at the end of contents. (issue #95)
+      stripped_contents = contents.strip
+      tail = contents[stripped_contents.length..-1]
+      stripped_contents.split("\n")[@options[:cut]..-1].join("\n") + tail
     end
     
     def comment_base

test/functional/command_line_test.rb

@@ -281,8 +281,7 @@ My whenever job that was already here
 # End Whenever generated tasks for: My identifier
 EXISTING_CRON
 
-      # here-doc adds an extra newline we need removed
-      assert_equal existing.strip, @command.send(:prepare, existing)
+      assert_equal existing, @command.send(:prepare, existing)
     end
     
     should "trim off the top lines of the file" do
@@ -302,8 +301,7 @@ My whenever job that was already here
 # End Whenever generated tasks for: My identifier
 NEW_CRON
 
-      # here-doc adds an extra newline we need removed
-      assert_equal new_cron.strip, @command.send(:prepare, existing)
+      assert_equal new_cron, @command.send(:prepare, existing)
     end
   end