diff --git a/KDOC_PREPROCESSING.md b/KDOC_PREPROCESSING.md
index a387b09333..c4f145f8ab 100644
--- a/KDOC_PREPROCESSING.md
+++ b/KDOC_PREPROCESSING.md
@@ -695,7 +695,7 @@ function, interface, or class as HTML.
The Markdown of the KDoc is rendered to HTML using [JetBrains/markdown](https://github.com/JetBrains/markdown) and, in
the case of DataFrame, put in [./docs/StardustDocs/resources/snippets/kdocs](docs/StardustDocs/resources/snippets/kdocs).
From there, the HTML can be included in any WriterSide page as an iFrame.
-This can be done using our custom `
columnGroup
| [column, ..]
| [{ condition }]
| { colsSelector }
| .allCols()
| .allCols(Before|After|From|UpTo) ( (column) | { colSelector } )
| .allColsExcept { colsSelector }
| .allColsExcept(columnNoAccessor, ..)
| .and (|{ columnOrSet }|)
| (.col| .valueCol| .frameCol| .colGroup)[<T>](column | index)
| (.cols| .valueCols| .frameCols| .colGroups) [ { condition } ]
| .cols[<T>](column,.. |index,.. |indexRange)
| .colsAtAnyDepth [ { condition } ]
| .colsInGroups [ { condition } ]
| .colsName(Starts|Ends)With(text[, ignoreCase])
| .colsNameContains(text[, ignoreCase] | regex)
| .colsOfKind(kind, ..) [ { condition } ]
| .colsWithoutNulls()
| .drop(Last)Cols(number)
| .drop(Last)ColsWhile { condition }
| .except { colsSelector }
| .except(columnNoAccessor, ..)
| (.firstCol| .lastCol| .singleCol) [ { condition } ]
| .select { colsSelector }
| .take(Last)Cols(number)
| .take(Last)ColsWhile { condition }
singleColumn
.colsOf<T> [ (kType) ] [ { condition } ]
columnGroupReference
.colsOf<T>(kType) [ { condition } ]
columnSet
[index]
| [index,.. |indexRange]
| [{ condition }]
| .all()
| .all(Before|After|From|UpTo) ( (column) | { condition } )
| .and (|{ columnOrSet }|)
| (.col| .valueCol| .frameCol| .colGroup)(index)
| (.cols| .valueCols| .frameCols| .colGroups) [ { condition } ]
| .cols(index,.. |indexRange)
| .colsAtAnyDepth [ { condition } ]
| .colsInGroups [ { condition } ]
| .colsOf<T> [ (kType) ] [ { condition } ]
| .colsOfKind(kind, ..) [ { condition } ]
| .distinct()
| .drop(Last)(number)
| .drop(Last)While { condition }
| except [ { ] columnsResolver [ } ]
| except column
| .except(column, ..)
| .filter { condition }
| (.first| .last| .single) [ { condition } ]
| .name(Starts|Ends)With(text[, ignoreCase])
| .nameContains(text[, ignoreCase] | regex)
| .simplify()
| .take(Last)(number)
| .take(Last)While { condition }
| .withoutNulls()