Treat commas as punctuation syntax

Author: yuhan0

CHANGELOG.md

@@ -18,7 +18,7 @@
 
 ### Changes
 
-* Inline definition of `clojure-mode-syntax-table` and support `'` quotes in symbols and commas as whitespace.
+* Inline definition of `clojure-mode-syntax-table` and support `'` quotes in symbols.
 * Enhance add arity refactoring to support a `defn` inside a reader conditional.
 * Enhance add arity refactoring to support new forms: `letfn`, `fn`, `defmacro`, `defmethod`, `defprotocol`, `reify` and `proxy`.
 

clojure-mode.el

@@ -316,7 +316,8 @@ Out-of-the box `clojure-mode' understands lein, boot, gradle,
     (modify-syntax-entry ?\xa0 " " table) ; non-breaking space
     (modify-syntax-entry ?\t " " table)
     (modify-syntax-entry ?\f " " table)
-    (modify-syntax-entry ?, " " table)
+    ;; Setting commas as whitespace makes functions like `delete-trailing-whitespace' behave unexpectedly (#561)
+    (modify-syntax-entry ?, "." table)
 
     ;; Delimiters
     (modify-syntax-entry ?\( "()" table)