fix fenced code blocks have to have the same level

base/markdown/GitHub/GitHub.jl

@@ -12,18 +12,23 @@ function fencedcode(stream::IO, block::MD, config::Config)
 
  # inline code block
  if contains(flavor, string(ch) ^ n)
+ #TODO edge case where this is a string(ch) ^ (n + 1)
  seek(stream, start)
  return false
  end
 
  buffer = IOBuffer()
  while !eof(stream)
+ line_start = position(stream)
  if startswith(stream, string(ch) ^ n)
- push!(block, Code(flavor, takebuf_string(buffer) |> chomp))
- return true
- else
- write(buffer, readline(stream))
+ if !startswith(stream, string(ch))
+ push!(block, Code(flavor, takebuf_string(buffer) |> chomp))
+ return true
+ else
+ seek(stream, line_start)
+ end
  end
+ write(buffer, readline(stream))
  end
  seek(stream, start)
  return false