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like so
``` - add language identifier to highlight code ```python
def function(foo):
print(foo)
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lang-bash
if ! pidof /usr/bin/Xvfb; then : do something; fiif ! pidof /usr/bin/Xvfb; then Xvfb :0 -screen 5 1024x768x8 & fi"if you want to run command in background.if ! pgrep Xvfb; then ...should do the trick.