make return value of the fun double(...) explicit
make return value of the fun double(...) explicit

Either that way or by adding three dots to the body of the function see fun powerOf(...) below.
meilalina/kotlin-web-site,JetBrains/kotlin-web-site,JetBrains/kotlin-web-site,madvirus/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,madvirus/kotlin-web-site,madvirus/kotlin-web-site,meilalina/kotlin-web-site,meilalina/kotlin-web-site,JetBrains/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,meilalina/kotlin-web-site,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn