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diff --git a/src/tools/clippy/src/docs/suspicious_splitn.txt b/src/tools/clippy/src/docs/suspicious_splitn.txt
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+++ b/src/tools/clippy/src/docs/suspicious_splitn.txt
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+### What it does
+Checks for calls to [`splitn`]
+(https://doc.rust-lang.org/std/primitive.str.html#method.splitn) and
+related functions with either zero or one splits.
+
+### Why is this bad?
+These calls don't actually split the value and are
+likely to be intended as a different number.
+
+### Example
+```
+for x in s.splitn(1, ":") {
+    // ..
+}
+```
+
+Use instead:
+```
+for x in s.splitn(2, ":") {
+    // ..
+}
+```
+\ No newline at end of file