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diff --git a/src/tools/clippy/src/docs/manual_filter.txt b/src/tools/clippy/src/docs/manual_filter.txt
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+++ b/src/tools/clippy/src/docs/manual_filter.txt
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+### What it does
+Checks for usages of `match` which could be implemented using `filter`
+
+### Why is this bad?
+Using the `filter` method is clearer and more concise.
+
+### Example
+```
+match Some(0) {
+    Some(x) => if x % 2 == 0 {
+                    Some(x)
+               } else {
+                    None
+                },
+    None => None,
+};
+```
+Use instead:
+```
+Some(0).filter(|&x| x % 2 == 0);
+```
+\ No newline at end of file