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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)
``` - put returns between paragraphs
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--no-same-permissionsis the default for non-rootusers. That would also affect directories making them non-searchable, so(umask 111; tar xf file.tar)would only work if the archive didn't contain any directory.