fix style errors
fix style errors

steverobb/async,ezubarev/async,hargasinski/async,Kikobeats/async,rlugojr/async,jnordberg/async,suguru03/async,ecasilla/async,Segeon-Kim/async,Segeon-Kim/async,Kikobeats/async,caolan/async,steverobb/async,hargasinski/async,jnordberg/async,suguru03/async,ezubarev/async,ecasilla/async,arigo-software/async,andalm/async,rlugojr/async,andalm/async,caolan/async,arigo-software/async,Segeon-Kim/async