Makes '#' a symbol constituent character with the prefix flag.

Being a symbol constituent means that it will be considered part of a
symbol.

Having the prefix flag means that it will get skipped for navigation
purposes.

Author: pjstadig

clojure-mode.el

@@ -276,9 +276,9 @@
          "\\>")
        1 font-lock-type-face)
       ;; Constant values (keywords), including as metadata e.g. ^:static
-      ("\\<^?:\\(\\sw\\)+\\>" 0 font-lock-constant-face)
+      ("\\<^?:\\(\\sw\\|\\s_\\)+\\(\\>\\|\\_>\\)" 0 font-lock-constant-face)
       ;; Meta type annotation #^Type or ^Type
-      ("#?^\\sw+" 0 font-lock-preprocessor-face)
+      ("#?^\\(\\sw\\|\\s_\\)+" 0 font-lock-preprocessor-face)
       ("\\<io\\!\\>" 0 font-lock-warning-face)
 
       ;;Java interop highlighting
@@ -367,7 +367,7 @@ Clojure to load that file."
     (modify-syntax-entry ?\] ")[" table)
     (modify-syntax-entry ?^ "'" table)
     ;; Make hash a usual word character
-    (modify-syntax-entry ?# "w" table)
+    (modify-syntax-entry ?# "_ p" table)
     table))
 
 (defvar clojure-mode-abbrev-table nil