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diff --git a/compiler/rustc_error_codes/src/error_codes/E0214.md b/compiler/rustc_error_codes/src/error_codes/E0214.md
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+A generic type was described using parentheses rather than angle brackets.
+
+Erroneous code example:
+
+```compile_fail,E0214
+let v: Vec(&str) = vec!["foo"];
+```
+
+This is not currently supported: `v` should be defined as `Vec<&str>`.
+Parentheses are currently only used with generic types when defining parameters
+for `Fn`-family traits.
+
+The previous code example fixed:
+
+```
+let v: Vec<&str> = vec!["foo"];
+```