add support for pdf

doc/NERD_commenter.txt

@@ -807,7 +807,7 @@ if your face looked like a toaster and a t-rex put together? :(
     - add support for javacc, thanks to Matt Tolton.
     - make <%# %> the default delims for eruby, thanks to tpope.
     - add support for javascript.jquery, thanks to Ivan Devat.
-    - add support for cucumber, fix sass delims, thanks to tpope
+    - add support for cucumber and pdf, fix sass delims, thanks to tpope
 
 2.2.1
     - add support for newlisp and clojure, thanks to Matthew Lee Hinman.
@@ -1072,7 +1072,7 @@ Andrey Skvortsov                    mp
 Simon Hengel                        htmlcheetah
 Matt Tolton                         javacc
 Ivan Devat                          javascript.jquery
-tpope                               cucumber
+tpope                               cucumber,pdf
 ==============================================================================
 9. License                                                    *NERDComLicense*
 

plugin/NERD_commenter.vim

@@ -612,6 +612,8 @@ function s:SetUpForNewFiletype(filetype, forceReset)
         call s:MapDelimiters('#', '')
     elseif a:filetype ==? "pccts"
         call s:MapDelimitersWithAlternative('//','', '/*','*/')
+    elseif a:filetype ==? "pdf"
+        call s:MapDelimiters('%', '')
     elseif a:filetype ==? "perl"
         call s:MapDelimiters('#', '')
     elseif a:filetype ==? "pfmain"