diff --git a/clippy_lints/src/doc/too_long_first_doc_paragraph.rs b/clippy_lints/src/doc/too_long_first_doc_paragraph.rs
index 9e7166111141..0165d24c7df2 100644
--- a/clippy_lints/src/doc/too_long_first_doc_paragraph.rs
+++ b/clippy_lints/src/doc/too_long_first_doc_paragraph.rs
@@ -85,10 +85,11 @@ pub(super) fn check(
                 let Some(comment_form) = first.get(..3) else {
                     return;
                 };
+
                 diag.span_suggestion(
                     new_span,
                     "add an empty line",
-                    format!("{snippet}{comment_form}\n"),
+                    format!("{snippet}{comment_form}{snippet}"),
                     Applicability::MachineApplicable,
                 );
             }
diff --git a/tests/ui/too_long_first_doc_paragraph_module_level.fixed b/tests/ui/too_long_first_doc_paragraph_module_level.fixed
index 41ce507d33d1..5fa3a8c73ceb 100644
--- a/tests/ui/too_long_first_doc_paragraph_module_level.fixed
+++ b/tests/ui/too_long_first_doc_paragraph_module_level.fixed
@@ -4,7 +4,7 @@ pub mod foo {
     // in foo.rs
     //! A very short summary.
     //!
-//! A much longer explanation that goes into a lot more detail about
+    //! A much longer explanation that goes into a lot more detail about
     //! how the thing works, possibly with doclinks and so one,
     //! and probably spanning a many rows. Blablabla, it needs to be over
     //! 200 characters so I needed to write something longeeeeeeer.
diff --git a/tests/ui/too_long_first_doc_paragraph_module_level.stderr b/tests/ui/too_long_first_doc_paragraph_module_level.stderr
index fd75611e6ff2..26759939881e 100644
--- a/tests/ui/too_long_first_doc_paragraph_module_level.stderr
+++ b/tests/ui/too_long_first_doc_paragraph_module_level.stderr
@@ -14,6 +14,7 @@ help: add an empty line
    |
 LL ~     //! A very short summary.
 LL +     //!
+LL ~     //! A much longer explanation that goes into a lot more detail about
    |
 
 error: aborting due to 1 previous error