``` fixes

index.mjs

@@ -406,7 +406,7 @@ const syntax = {
         paired: true, 
         recursive: false,
         startRegexp: /\n```(\w+)\s*\n/,
-        endRegexp: /\n```\s*\n/,
+        endRegexp: /\n```[ \t]*\n/,
         title: {
             recursive: false
         },
@@ -423,7 +423,7 @@ const syntax = {
         begin: 1,
         forward:  {
             point: 'endEnd',
-            offset: 0
+            offset: -1
         },
     },
     unOrderedList: {