README: Improved println hint.
README: Improved println hint.

bpowers/gopherjs,ebroder/gopherjs,bpowers/gopherjs,gopherjs/gopherjs,jargv/gopherjs,rasata/gopherjs,gopherjs/gopherjs,ebroder/gopherjs,govlas/gopherjs,rasata/gopherjs,Yanjing123/gopherjs,rasata/gopherjs,gopherjs/gopherjs,gopherjs/gopherjs,Archs/gopherjs,jargv/gopherjs,roth1002/gopherjs,albrow/gopherjs,jeremyschlatter/gopherjs,flimzy/gopherjs,Archs/gopherjs,albrow/gopherjs,flimzy/gopherjs,flimzy/gopherjs,bpowers/gopherjs,jeremyschlatter/gopherjs,jeremyschlatter/gopherjs,roth1002/gopherjs,govlas/gopherjs,Yanjing123/gopherjs,Yanjing123/gopherjs,roth1002/gopherjs,govlas/gopherjs,jargv/gopherjs,Archs/gopherjs,ebroder/gopherjs,albrow/gopherjs,nmfzone/gopherjs,gopherjs/gopherjs,nmfzone/gopherjs,nmfzone/gopherjs