Added feature flag to doc test

rust-lang · Dylan-DPC-zz · Feb 27, 2021 · Feb 27, 2021 · Feb 27, 2021 · Mar 31, 2021
commit 907eab8e62d44b262a224eb3f5f6f70d5737ff15
diff --git a/library/core/src/str/iter.rs b/library/core/src/str/iter.rs
@@ -196,6 +196,7 @@ impl<'a> CharIndices<'a> {
     /// # Examples
     ///
     /// ```
+    /// #![feature(char_indices_offset)]
     /// let mut chars = "a楽".char_indices();
     ///
     /// assert_eq!(chars.offset(), 0);