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Since print_page_residency_chart() was only ever called with the first parameter set to stdout, this API flexibility is not used. Simplify API until it's needed by removing the first parameter.
This makes it easier to reason about function, knowing that it's never called outside this compilation unit.
The carriage return is not needed the first time print_page_residency_chart() is called. By moving \r printing to the caller, it knows which is the first time. Only within the o_touch loop is print_page_residency_chart() called multiple times, so only within that loop is \r necessary. The final call to print_page_residency_chart() has been removed since it would print identical content to the previous time it was called, whether than be within the o_touch loop or not. Hence it has been removed as all that's needed is to terminate the line with \n.
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Issue #53 relates to unwanted carriage return characters.
Their purpose it to redraw an existing line. However they're only needed on occasions where the line needs output more than once. If there's only one version of the line to output, then the
\rcharacters can be avoided.