-> Arrow problem in Kotlin

I don’t know if anybody else is getting this problem. The problem is when I type the -> in editor in kotlinglang.org I get an arrow that I am unable to produce it here (this box does not allow pic). when I run the program, I get this error Expecting ‘->’ ! I tried several things, turning of autocorrect in the Chrome browser and in Windows 10. Nothing work. The undesirable arrow persists.
Would someone please give me some suggestions to try?

This image is suppose to be the undesirable arrow that I am not sure if you can seeimage|37x26