Revert "Only enable within-string diffing when selected."

This reverts commit 6d28880.

src/lambdaisland/deep_diff2/diff_impl.cljc

@@ -97,17 +97,6 @@
          (diff-seq-insertions ins)
          (into []))))
 
-(defn diff-string [exp act]
-  (->>  (diff-seq exp act)
-       (map #(if (char? %) {:= %} %))
-       (partition-by (comp first keys))
-       (map (fn [[first-element :as coll]]
-              (let [head (first (keys first-element))
-                    contents (mapcat vals coll)]
-                {head (apply str contents) })
-              )))
-  )
-
 (defn diff-set [exp act]
   (into
    (into #{}
@@ -142,7 +131,7 @@
       exp-ks))))
 
 (defn primitive? [x]
-  (or (number? x) (boolean? x) (inst? x) (keyword? x) (symbol? x)))
+  (or (number? x) (string? x) (boolean? x) (inst? x) (keyword? x) (symbol? x)))
 
 (defn diff-atom [exp act]
   (if (= exp act)
@@ -162,30 +151,23 @@
    (defn array? [x]
      (and x (.isArray (class x)))))
 
-(defn diff 
-  ([exp act]
-   (diff exp act {}))
-  ([exp act {:keys [diff-strings?] :as _opts}]
-   (cond
-     (nil? exp)
-     (diff-atom exp act)
-
-     (and (diffable? exp)
-          (= (data/equality-partition exp) (data/equality-partition act)))
-     (diff-similar exp act)
+(defn diff [exp act]
+  (cond
+    (nil? exp)
+    (diff-atom exp act)
 
-     (array? exp)
-     (diff-seq exp act)
+    (and (diffable? exp)
+         (= (data/equality-partition exp) (data/equality-partition act)))
+    (diff-similar exp act)
 
-     (record? exp)
-     (diff-map exp act)
+    (array? exp)
+    (diff-seq exp act)
 
-     (and diff-strings?
-       (string? exp))
-     (diff-string exp act)
+    (record? exp)
+    (diff-map exp act)
 
-     :else
-     (diff-atom exp act))))
+    :else
+    (diff-atom exp act)))
 
 (extend-protocol Diff
   #?(:clj java.util.Set :cljs cljs.core/PersistentHashSet)