Turn off print-namespace-maps across all tasks, not just uberjar.

leiningen-core/src/leiningen/core/main.clj

@@ -337,7 +337,10 @@ These get replaced with the corresponding values from the project map."
   "Entry point for tasks run other tasks as if they were called from the CLI."
   [project args]
   (let [[task-name args] (task-args args project)]
-    (apply-task task-name project args)))
+    ;; See https://github.com/technomancy/leiningen/issues/2530
+    ;; We can't assume the project uses the same clojure version as lein does.
+    (binding [*print-namespace-maps* false]
+      (apply-task task-name project args))))
 
 (defn leiningen-version []
   (or (System/getenv "LEIN_VERSION")

src/leiningen/uberjar.clj

@@ -53,16 +53,10 @@
   "Project `:uberjar-merge-with` merger for components.xml files."
   [components-read into components-write])
 
-(defn- pr-str-backwards-compatibly
-  "Produce EDN that should work with older clojure versions."
-  [val]
-  (binding [*print-namespace-maps* false]
-    (pr-str val)))
-
 (def clj-map-merger
   "Project `:uberjar-merge-with` for files containing a single map
   read with `clojure.core/read`, such as data_readers.clj."
-  [(comp read-string slurp) merge #(spit %1 (pr-str-backwards-compatibly %2))])
+  [(comp read-string slurp) merge #(spit %1 (pr-str %2))])
 
 (defn- merger-match? [[pattern] filename]
   (boolean