fixup! Allow trailing spaces in code blocks

test/code_block_fenced.md

@@ -12,7 +12,7 @@ This is a code block that won't trigger.
 ```text
 This is code
  
-with an empty line.
+with a line with trailing spaces. {MD009:14}
 ```
 
 But we'll do another:
@@ -21,4 +21,3 @@ But we'll do another:
     will.
 
 Final text is here
-{MD009:14}

test/trailing_spaces_br.md

@@ -1,6 +1,6 @@
 This line has a single trailing space {MD009} 
 This line has two trailing spaces and should be allowed  
 This line has three trailing spaces {MD009}   
- 
-{MD009:4}
 This line has four trailing spaces {MD009}    
+ 
+{MD009:5}