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diff --git a/src/tools/clippy/src/docs/useless_conversion.txt b/src/tools/clippy/src/docs/useless_conversion.txt
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+### What it does
+Checks for `Into`, `TryInto`, `From`, `TryFrom`, or `IntoIter` calls
+which uselessly convert to the same type.
+
+### Why is this bad?
+Redundant code.
+
+### Example
+```
+// format!() returns a `String`
+let s: String = format!("hello").into();
+```
+
+Use instead:
+```
+let s: String = format!("hello");
+```
+\ No newline at end of file