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diff --git a/src/tools/clippy/src/docs/needless_doctest_main.txt b/src/tools/clippy/src/docs/needless_doctest_main.txt
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+++ b/src/tools/clippy/src/docs/needless_doctest_main.txt
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+### What it does
+Checks for `fn main() { .. }` in doctests
+
+### Why is this bad?
+The test can be shorter (and likely more readable)
+if the `fn main()` is left implicit.
+
+### Examples
+```
+/// An example of a doctest with a `main()` function
+///
+/// # Examples
+///
+/// ```
+/// fn main() {
+///     // this needs not be in an `fn`
+/// }
+/// ```
+fn needless_main() {
+    unimplemented!();
+}
+```
+\ No newline at end of file