If the argument to make_file can act like a file, return it. This is useful for code that calls command functions, but doesn't want to send I/O through the filesystem.

     1

#header#

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    <title>#repo|escape#: #file# history</title>

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    <description>#file# revision history</description>

     4

    #entries#

     5

  </channel>

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</rss>