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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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lang-bash
shift $(($# - 1))- no need for an external utility. Works in Bash, ksh, zsh and dash.$((...))syntax.printf '%s\n' "$1"in order to avoid unexpected behaviour fromecho(e.g. for-n).