docs/design/part-clocks.txt: minor corrections
docs/design/part-clocks.txt: minor corrections

shelsonjava/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer,centricular/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,shelsonjava/gstreamer,centricular/gstreamer,krichter722/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,krichter722/gstreamer,centricular/gstreamer,jpxiong/gstreamer