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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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lang-c
$ sed -r "s/^\s+//g" test.c|sed '/^\/\*.*\*\/$/d'sed: illegal option -- rusage: sed script [-Ealn] [-i extension] [file ...] sed [-Ealn] [-i extension] [-e script] ... [-f script_file] ... [file ...]-ris only available for GNUsed. Mostsedflavors (including GNU) understand-Efor extended regular expressions instead. Anyhow, this code will modifycindention.