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5

That will fail if foo contains only spaces
– Brian
Commented May 20, 2010 at 21:16
4

Will also fail in some shells if foo begins with a dash since it is interpreted as an option. E.g. on solaris ksh, zsh and bash are no problem, sh and /bin/test will fail
– ktf
Commented Oct 20, 2011 at 7:40

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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
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
to make links (use https whenever possible)
<https://example.com>
[example](https://example.com)
<a href="https://example.com">example</a>

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