improve documentation for folding (#416)
improve documentation for folding (#416)

asciidoctor/asciidoctor-intellij-plugin,asciidoctor/asciidoctor-intellij-plugin,asciidoctor/asciidoctor-intellij-plugin,asciidoctor/asciidoctor-intellij-plugin,asciidoctor/asciidoctor-intellij-plugin