output ppm to stderr to avoid flushing stdout buffer #43
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Output to stdout is buffered. For interactive console it will be flushed automatically after \n, for non-interactive it will be flushed only after fflush(stdout). During calling rtl_test from external process it's unable to read ppm since output was to stdout and there was no fflush
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Output to stdout is buffered. For interactive console it will be flushed
automatically after \n, for non-interactive it will be flushed only
after fflush(stdout). When calling rtl_test from external process it
unable to read ppm since output was to stdout and there was no fflush