diff --git a/_content/doc/comment.md b/_content/doc/comment.md
index f945ecf..1c9cd67 100644
--- a/_content/doc/comment.md
+++ b/_content/doc/comment.md
@@ -497,6 +497,8 @@
 `//toolname:directive`.
 
 Gofmt removes leading and trailing blank lines in doc comments.
+If all lines in a doc comment begin with the same sequence of
+spaces and tabs, gofmt removes that prefix.
 
 ### Paragraphs {#paragraphs}