Curly-braces around the type in @param allows spaces/non-word characters.

Justin Wunderle · Justin Wunderle · commit ccd298869cfe · 2011-06-30T12:44:21.000-04:00
ex: /** * @param {function(string, string)} callback The callback function... */
diff --git a/syntax/javascript.vim b/syntax/javascript.vim
@@ -58,7 +58,8 @@ if !exists("javascript_ignore_javaScriptdoc")
   " other tags (no extra syntax)
   syntax match  javaScriptDocTags         contained "@\(access\|addon\|alias\|author\|beta\|constant\|constructor\|copyright\|deprecated\|description\|event\|example\|exec\|field\|fileOverview\|fileoverview\|function\|global\|ignore\|inner\|license\|overview\|private\|protected\|project\|public\|readonly\|since\|static\)\>"
 
-  syntax match  javaScriptDocType         contained "\%(#\|\"\|{\|}\|\w\|\.\|:\|\/\)\+" nextgroup=javaScriptDocParam skipwhite
+  syntax region javaScriptDocType         start="{" end="}" oneline contained nextgroup=javaScriptDocParam skipwhite
+  syntax match  javaScriptDocType         contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+" nextgroup=javaScriptDocParam skipwhite
   syntax match  javaScriptDocTypeNoParam  contained "\%(#\|\"\|{\|}\|\w\|\.\|:\|\/\)\+"
   syntax match  javaScriptDocParam        contained "\%(#\|\"\|{\|}\|\w\|\.\|:\|\/\)\+"
   syntax region javaScriptDocSeeTag       contained matchgroup=javaScriptDocSeeTag start="{" end="}" contains=javaScriptDocTags
