expected:<65[ 119esi 111dl 111lw 108dvei 105n 97n 111]ka> 
but was: <65[  119 esi 111 dl 111 lw 108 dvei 105 n 97 n 111 ]ka>

I see the error message like this, it's related to how you replace the first character.

Yes, use the markdown and mark your post as having spoiler content too so we can check what could be wrong.

Maybe there are more spaces than needed there but can't be seen because you didn't use backticks to format the code. To increase the readability of comments or descriptions, see this page in the github wiki.