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-rw-r--r--src/tools/compiletest/src/runtest.rs4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 25a135aa320..0674debd6a2 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -2109,6 +2109,10 @@ impl<'test> TestCx<'test> {
             .collect()
     }
 
+    /// This method is used for `//@ check-test-line-numbers-match`.
+    ///
+    /// It checks that doctests line in the displayed doctest "name" matches where they are
+    /// defined in source code.
     fn check_rustdoc_test_option(&self, res: ProcRes) {
         let mut other_files = Vec::new();
         let mut files: HashMap<String, Vec<usize>> = HashMap::new();