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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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... -exec mv {} {}.bak ...is not guranteed to work as expected with allfindimplementations. The POSIX standard states{}must appear alone to be always recognized, otherwise the behavior is free to keep the characters unchanged or to replace them by the pathname. In the former case, your whole command will essentially delete all files but the last one found...