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If using GNU sed, I would start with the least voted answers which use sed's q command to set the exit code. (Sadly q's exit code argument is not POSIX compliant.)

manatwork
– manatwork

2012-11-15 13:09:15 +00:00
Commented Nov 15, 2012 at 13:09
1

The least voted answer has changed. I think the answer @manatwork is referring to is stackoverflow.com/a/12144882/1033422

Chris Snow
– Chris Snow

2014-01-07 08:52:17 +00:00
Commented Jan 7, 2014 at 8:52

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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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