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External links can break, in which case that last part of your answer wouldn't make much sense. It's better to include enough information within the answer so that it's self-contained, and use the link for attribution and further reading. In this case, describe the gist of the idea from the link here (a sentence or two), in addition to the link. Thanks.
– fixer1234
Commented Jan 2, 2017 at 2:46

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

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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