Update changelog, add tests

CHANGELOG.md

@@ -26,6 +26,7 @@ For a list of breaking changes, check [here](#breaking-changes).
 - [#2407](https://github.com/clj-kondo/clj-kondo/issues/2407): support ignore hint on called symbol
 - [#2420](https://github.com/clj-kondo/clj-kondo/issues/2420): Detect uneven number of clauses in `cond->` and `cond->>`
 - [#2415](https://github.com/clj-kondo/clj-kondo/issues/2415): false positive type checking issue with `str/replace` and `^String` annotation
+- [#2212](https://github.com/clj-kondo/clj-kondo/issues/2212): new linter: `:redundant-nesting`
 
 ## 2024.09.27
 

test/clj_kondo/redundant_nesting_test.clj

@@ -0,0 +1,17 @@
+(ns clj-kondo.redundant-nesting-test
+  (:require [clj-kondo.test-utils :refer [lint! assert-submaps]]
+            [clojure.test :refer [deftest is testing]]))
+
+(deftest redundant-nesting-test
+  (assert-submaps
+   '({:file "<stdin>", :row 1, :col 10, :level :warning, :message "Nested use of min is redunant"})
+   (lint! "(min 5 2 (min 3 7))"))
+  (assert-submaps
+   '({:file "<stdin>", :row 1, :col 8, :level :warning, :message "Nested use of * is redunant"})
+   (lint! "(* 3 4 (* 5 6))"))
+  (assert-submaps
+   '({:file "<stdin>", :row 1, :col 18, :level :warning, :message "Nested use of str is redunant"})
+   (lint! "(str \"foo\" \"bar\" (str \"baz\" \"qux\"))"))
+  (assert-submaps
+   '({:file "<stdin>", :row 1, :col 21, :level :warning, :message "Nested use of concat is redunant"})
+   (lint! "(concat [1 2] [3 4] (concat [5 6] [7 8]))")))