Tweak the new pprint functions to have single-arity version

Originally I didn't notice that other middlewares were making use
of the same functions.

src/cider/nrepl/middleware/format.clj

@@ -45,7 +45,7 @@
 (defn- format-edn
   [edn pprint-fn]
   (->> (read-edn edn)
-       (map #(with-out-str (pprint-fn %)))
+       (map #(pprint-fn %))
        str/join
        str/trim))
 

src/cider/nrepl/middleware/stacktrace.clj

@@ -249,7 +249,7 @@
   of pretty printed problems. The content of the returned map is modeled after
   `clojure.spec/explain-printer`."
   [ed pprint-fn]
-  (let [pp-str #(with-out-str (pprint-fn %))
+  (let [pp-str #(pprint-fn %)
         problems (sort-by #(count (:path %))
                           (or (:clojure.spec/problems ed)
                               (:clojure.spec.alpha/problems ed)))]

src/cider/nrepl/pprint.clj

@@ -2,7 +2,7 @@
   "Pretty-print related utilities.
   All functions here are simple wrappers that ensure a consistent API:
 
-  * two params - object to print and a map of print options
+  * has one and two params signatures - object to print and a map of print options
   * the keys of the print options map can be strings, as bencode clients can't send keywords
   * functions return the printed object as a string"
   {:added "0.20.0"}
@@ -14,25 +14,33 @@
   "A simple wrapper around `clojure.pprint/write`.
   It provides an API compatible with what nREPL's
   pr-values middleware expects for printer functions."
-  [object opts]
-  (let [opts (assoc (walk/keywordize-keys opts) :stream nil)]
-    (apply pp/write object (vec (flatten (vec opts))))))
+  ([object]
+   (pprint object {}))
+  ([object opts]
+   (let [opts (assoc (walk/keywordize-keys opts) :stream nil)]
+     (apply pp/write object (vec (flatten (vec opts)))))))
 
 (def ^:private fipp-printer
   (delay
    (do
      (require 'fipp.edn)
      (resolve 'fipp.edn/pprint))))
 
-(defn fipp-pprint [object opts]
-  (with-out-str
-    (@fipp-printer object (walk/keywordize-keys opts))))
+(defn fipp-pprint
+  ([object]
+   (fipp-pprint object {}))
+  ([object opts]
+   (with-out-str
+     (@fipp-printer object (walk/keywordize-keys opts)))))
 
 (def ^:private puget-printer
   (delay
    (do
      (require 'puget.printer)
      (resolve 'puget.printer/pprint-str))))
 
-(defn puget-pprint [object opts]
-  (@puget-printer object (walk/keywordize-keys opts)))
+(defn puget-pprint
+  ([object]
+   (puget-pprint object {}))
+  ([object opts]
+   (@puget-printer object (walk/keywordize-keys opts))))