add the file with the file-parsing function

src/advent2023/utils.clj

@@ -0,0 +1,11 @@
+(ns advent2023.utils
+  (:require [advent2023.utils :as u]
+            [clojure.string :as str]))
+
+(defn parse-aoc-file
+  "convert the typical Advent Of Code file into a seq of lines"
+  [file-name]
+  (->> file-name
+    slurp
+    (str/split-lines)))
+