diff --git a/ChangeLog.md b/ChangeLog.md
index 80789918e9..07a4855a4d 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Fix analyzer [RCS1090](https://josefpihrt.github.io/docs/roslynator/analyzers/RCS1090) ([PR](https://github.com/dotnet/roslynator/pull/1566))
+- [CLI] Fix command `generate-doc` ([PR](https://github.com/dotnet/roslynator/pull/1568))
 
 ### Change
 
diff --git a/src/Documentation/TextUtility.cs b/src/Documentation/TextUtility.cs
index dc38e122a7..ba0f0366eb 100644
--- a/src/Documentation/TextUtility.cs
+++ b/src/Documentation/TextUtility.cs
@@ -35,6 +35,7 @@ public static string RemoveLeadingTrailingNewLine(
         }
 
         if (trailingNewLine
+            && length > startIndex
             && s[length - 1] == '\n')
         {
             length--;