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Rev

This should be added as a comment to the "confused" reply. Unfortunately you will be allowed to add such comments only after gaining 50 points of reputation. To the subject: Did you test it? I tested it with GNU tar 1.26 and the variants with and without dash are really different as described in the reply of jack. It behaves as it is written in the reply.
– pabouk - Ukraine stay strong
Commented Oct 19, 2013 at 12:14

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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
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