Remove org_image_file_regexp

Author: ricardoricho

lib/org-ruby/markdown_output_buffer.rb

@@ -49,10 +49,10 @@ def inline_formatting(input)
       @re_help.rewrite_links input do |link, defi|
         # We don't add a description for images in links, because its
         # empty value forces the image to be inlined.
-        defi ||= link unless link =~ @re_help.org_image_file_regexp
+        defi ||= link unless RegexpHelper.image_file.match(link)
         link = link.gsub(/ /, "%%20")
 
-        if defi =~ @re_help.org_image_file_regexp
+        if RegexpHelper.image_file.match(defi)
           "![#{defi}](#{defi})"
         elsif defi
           "[#{defi}](#{link})"

lib/org-ruby/regexp_helper.rb

@@ -170,10 +170,6 @@ def org_emphasis_regexp
                  "(?=#{post_emphasis})")
     end
 
-    def org_image_file_regexp
-      /\.(gif|jpe?g|webp|p(?:bm|gm|n[gm]|pm)|svgz?|tiff?|x[bp]m)/i
-    end
-
     private
 
     def pre_emphasis_regexp

lib/org-ruby/textile_output_buffer.rb

@@ -61,10 +61,10 @@ def inline_formatting(input)
 
         # We don't add a description for images in links, because its
         # empty value forces the image to be inlined.
-        defi ||= link unless link =~ @re_help.org_image_file_regexp
+        defi ||= link unless RegexpHelper.image_file.match(link)
         link = link.gsub(/ /, "%%20")
 
-        if defi =~ @re_help.org_image_file_regexp
+        if RegexpHelper.image_file.match(defi)
           defi = "!#{defi}(#{defi})!"
         elsif defi
           defi = "\"#{defi}\""