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$\begingroup$ Nicely done! I got stuck at the same place as you, i.e. it took me quite a while to deduce how to proceed. Impressive that you could do it in 4 and half hours (took me about 6 hours) :-) $\endgroup$
– Jens
Commented Aug 18, 2020 at 16:52

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Correct minor typos or mistakes
Clarify meaning without changing it
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Always respect the author’s intent
Don’t use edits to reply to the author

► mark spoilers by placing >! at start of line
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**
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>
MathJax equations $\sin^2 \theta$

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