fix: broken sample in mixing named - position args section (#1851)
fix: broken sample in mixing named - position args section (#1851)

* Replace single quote with double quote for first parameter in `reformat` function
* Replace type of 3rd parameter `Character` to `kotlin.Char`
JetBrains/kotlin-web-site,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site,hltj/kotlin-web-site-cn,JetBrains/kotlin-web-site