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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def generate_doxygen(app):
 """Run the doxygen make commands"""

    _run_cmd("cd %s/.. && make doxygen" % app.builder.srcdir)
    _run_cmd("cp -rf doxygen/html %s/doxygen" % app.builder.outdir)