deletions | additions       diff --git a/README.md b/README.md  index e67e363..508ce7c 100644  --- a/README.md  +++ b/README.md 
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C-x M-c M-butterfly  ## Nested fenced blocks  `````markdown  Foo:  ```ruby  block.parents.map {|b| b.language}  ```  bar.  `````  ---  ## LaTeX sync playground