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diff --git a/src/tools/clippy/src/docs/char_lit_as_u8.txt b/src/tools/clippy/src/docs/char_lit_as_u8.txt
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+### What it does
+Checks for expressions where a character literal is cast
+to `u8` and suggests using a byte literal instead.
+
+### Why is this bad?
+In general, casting values to smaller types is
+error-prone and should be avoided where possible. In the particular case of
+converting a character literal to u8, it is easy to avoid by just using a
+byte literal instead. As an added bonus, `b'a'` is even slightly shorter
+than `'a' as u8`.
+
+### Example
+```
+'x' as u8
+```
+
+A better version, using the byte literal:
+
+```
+b'x'
+```
+\ No newline at end of file