Redmine Markdown Extra Formatter で `[[マルチバイト]]` を扱うための bluefeather の dirty hack

bluefeather.rb.patch

--- bluefeather.rb.orig	2017-05-15 16:20:07.025427957 +0900
+++ bluefeather.rb	2017-05-15 16:20:41.598133562 +0900
@@ -1807,7 +1807,7 @@
 							@log.debug "%p" % @scanner.string[ startpos-1 .. @scanner.pos-1 ]
 							
 							rs.warnings << "link-id not found - #{linkid}"
-							text += @scanner.string[ startpos-1 .. @scanner.pos-1 ]
+							text += '[' + link + ']' + @scanner[0]
 						end
 	
 					# ...or for an inline style second part
@@ -1828,7 +1828,7 @@
 					# No linkid part: just append the first part as-is.
 					else
 						@log.debug "No linkid, so no anchor. Appending literal text."
-						text += @scanner.string[ startpos-1 .. @scanner.pos-1 ]
+						text += '[' + link + ']' 
 					end # if linkid
 	
 				# Plain text