Don't treat the symbol default as def* macro.

See b31e941#commitcomment-14257272

Author: Malabarba

clojure-mode.el

@@ -828,8 +828,9 @@ This function also returns nil meaning don't specify the indentation."
                        (or (and clojure-defun-style-default-indent
                                 ;; largely to preserve useful alignment of :require, etc in ns
                                 (not (string-match "^:" function)))
-                           (string-match "\\`\\(?:\\S +/\\)?\\(def\\|with-\\)"
-                                         function)))))
+                           (and (string-match "\\`\\(?:\\S +/\\)?\\(def\\|with-\\)"
+                                              function)
+                                (not (string-match "\\`default" function)))))))
          (+ lisp-body-indent containing-form-column))
         (_ (clojure--normal-indent calculate-lisp-indent-last-sexp))))))
 

test/clojure-mode-indentation-test.el

@@ -240,6 +240,11 @@ values of customisable variables."
   (:gen-class)
   )")
 
+(def-full-indent-test default-is-not-a-define
+  "(default a
+         b
+         b)")
+
 (def-full-indent-test non-symbol-at-start
   "{\"1\" 2
  *3 4}")