add mention of side effects

Author: ntBre

crates/ruff_linter/src/rules/pyflakes/rules/repeated_keys.rs

@@ -43,7 +43,8 @@ use crate::registry::Rule;
 /// ## Fix safety
 ///
 /// This rule's fix is marked as unsafe because removing a repeated dictionary key
-/// may delete comments that are attached to the removed key-value pair.
+/// may delete comments that are attached to the removed key-value pair. This can also change
+/// the program's behavior if the value expressions have side effects.
 ///
 /// ## References
 /// - [Python documentation: Dictionaries](https://docs.python.org/3/tutorial/datastructures.html#dictionaries)
@@ -114,7 +115,8 @@ impl Violation for MultiValueRepeatedKeyLiteral {
 /// ## Fix safety
 ///
 /// This rule's fix is marked as unsafe because removing a repeated dictionary key
-/// may delete comments that are attached to the removed key-value pair.
+/// may delete comments that are attached to the removed key-value pair. This can also change
+/// the program's behavior if the value expressions have side effects.
 ///
 /// ## References
 /// - [Python documentation: Dictionaries](https://docs.python.org/3/tutorial/datastructures.html#dictionaries)