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diff --git a/src/docs/question_mark.txt b/src/docs/question_mark.txt
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+### What it does
+Checks for expressions that could be replaced by the question mark operator.
+
+### Why is this bad?
+Question mark usage is more idiomatic.
+
+### Example
+```
+if option.is_none() {
+    return None;
+}
+```
+
+Could be written:
+
+```
+option?;
+```
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