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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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*expands to all the filenames in the current directory except the hidden ones, unless the shell optiondotglobis set.*includesbigfile,cat * >>bigfilewould, depending on thecatimplementation and the names sizes of the files involved, possibly loop indefinitely copyingbigfileinto itself or stop with or without an error.