fixing documentation for rect corner params https://github.com/processing/p5.js-website/pull/203/files closes #2879
fixing documentation for rect corner params https://github.com/processing/p5.js-website/pull/203/files closes #2879

nucliweb/p5.js,mlarghydracept/p5.js,mlarghydracept/p5.js,dhowe/p5.js,dhowe/p5.js,bomoko/p5.js,joecridge/p5.js,limzykenneth/p5.js,processing/p5.js,limzykenneth/p5.js,nucliweb/p5.js,joecridge/p5.js,bomoko/p5.js,processing/p5.js