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  • Hash : 2a950c94
    Author : Edward Thomson
    Date : 2015-04-27T10:43:50

    config: write existing lines as-is when rewriting
    
    When updating a configuration file, we want to copy the old data
    from the file to preserve comments and funny whitespace, instead
    of writing it in some "canonical" format.  Thus, we keep a
    pointer to the start of the line and the line length to preserve
    these things we don't care to rewrite.