node copy button

When I started with Drupal most problems were solved by finding the proper module. But after all I stumbled over the fact that there is no button on the node page for copying the complete contents of a node to a new one. This is sometimes usefull, if you have very similar nodes only differing in marginal fields. You don't want to click through tens of attributes only for modifying at last one item. Especially if the node is a little bit complex due to customized fields it would be smart to have a 'copy' function. It was a ten minute job to write a module doing this.