[O] bug if link description contains percent sign (%)

[Daniel Clemente]

With yesterday's org-mode: if I export (C-c C-o O O) this line of text, it 
fails because of the % character:

See [[file:/][the m%n syntax]].



Debugger entered--Lisp error: (error "Not enough arguments for format string")
  format(#("[[%s][the m%n syntax]]" 6 20 (:parent (link (:type "file" :path "/" 
:format bracket :raw-link "file:/" :application nil :search-option nil :begin 5 
:end 31 :contents-begin 15 :contents-end 29 :post-blank 0 :parent (paragraph 
(:begin 1 :end 33 :contents-begin 1 :contents-end 33 :post-blank 0 
:post-affiliated 1 :parent (section (:begin 1 :end 33 :contents-begin 1 
:contents-end 33 :post-blank 0 :post-affiliated 1 :parent ...) #4)) #("See " 0 
4 (:parent #4)) #2 #(".\n" 0 2 (:parent #4)))) #("the m%n syntax" 0 14 (:parent 
#2))))) "file:/")
  org-element-link-interpreter((link (:type "file" :path "/" :format bracket 
:raw-link "file:/" :application nil :search-option nil :begin 5 :end 31 
:contents-begin 15 :contents-end 29 :post-blank 0 :parent (paragraph (:begin 1 
:end 33 :contents-begin 1 :contents-end 33 :post-blank 0 :post-affiliated 1 
:parent (section (:begin 1 :end 33 :contents-begin 1 :contents-end 33 
:post-blank 0 :post-affiliated 1 :parent (org-data nil #4)) #2)) #("See " 0 4 
(:parent #2)) #0 #(".\n" 0 2 (:parent #2)))) #("the m%n syntax" 0 14 (:parent 
#0))) #("the m%n syntax" 0 14 (:parent (link (:type "file" :path "/" :format 
bracket :raw-link "file:/" :application nil :search-option nil :begin 5 :end 31 
:contents-begin 15 :contents-end 29 :post-blank 0 :parent (paragraph (:begin 1 
:end 33 :contents-begin 1 :contents-end 33 :post-blank 0 :post-affiliated 1 
:parent (section (:begin 1 :end 33 :contents-begin 1 :contents-end 33 
:post-blank 0 :post-affiliated 1 :parent ...) #4)) #("See " 0 4 (:parent #4)) 
#2 #(".\n" 0 2 (:parent #4)))) #("the m%n syntax" 0 14 (:parent #2))))))
  org-org-link(…)
  org-export-data(…)



Greetings,

Daniel