Improve documentation of Path.extendWithPath (#27793)
Improve documentation of Path.extendWithPath (#27793)

The documentation used the word "segment" instead of "sub-path".
The documentation of Path.addPath described adding a Path as adding a single sub-path.
jason-simmons/flutter_engine,devoncarew/engine,devoncarew/engine,Hixie/sky_engine,jason-simmons/flutter_engine,flutter/engine,chinmaygarde/flutter_engine,flutter/engine,chinmaygarde/flutter_engine,devoncarew/engine,devoncarew/engine,flutter/engine,jamesr/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,chinmaygarde/flutter_engine,jamesr/sky_engine,jamesr/flutter_engine,rmacnak-google/engine,Hixie/sky_engine,aam/engine,devoncarew/engine,jamesr/sky_engine,flutter/engine,rmacnak-google/engine,jamesr/sky_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,Hixie/sky_engine,Hixie/sky_engine,aam/engine,aam/engine,chinmaygarde/flutter_engine,flutter/engine,rmacnak-google/engine,jamesr/flutter_engine,jamesr/flutter_engine,rmacnak-google/engine,aam/engine,jamesr/sky_engine,jason-simmons/flutter_engine,jamesr/flutter_engine,jamesr/flutter_engine,Hixie/sky_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,Hixie/sky_engine,aam/engine,aam/engine,jamesr/flutter_engine,jamesr/flutter_engine,flutter/engine,rmacnak-google/engine,rmacnak-google/engine,aam/engine,Hixie/sky_engine,chinmaygarde/flutter_engine,jamesr/sky_engine,devoncarew/engine,chinmaygarde/flutter_engine,rmacnak-google/engine,jamesr/flutter_engine,flutter/engine,jamesr/sky_engine,Hixie/sky_engine,devoncarew/engine,jamesr/sky_engine,flutter/engine,aam/engine