What is the best way to quickly and easily open a file, edit a single line (with s/<old>/<new>/), and then save?

As of right now I will open the file and then save an edited version under a different name. Then I will delete the original file and then rename the new-edited version so it will take the place of the now deleted original file.

Is there a quicker way to do this? Or is the use of a temp file the only way to get this done?

In reply to Best way to edit a file? by wackattack

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