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This command starts to work for me, it shows me the diff side by side. However, as soon as I try and edit anything the vim window goes crazy. I start typing and I get a bash prompt behind the words in vim on either side of the screen. So it seems to display the diff, but then vim crashes. Additionally, I get this error Vim: Error reading input, exiting... any ideas what is going wrong here?
– Trevor
Commented Jun 10, 2014 at 0:06
@Trevor: I could only guess what the problems are. It is indeed not save to make any modifications while diffing like this. Hence I have added "-M" parameter to disallow it entirely. Sorry.
– Tobias Heinicke
Commented Jun 12, 2014 at 18:13

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Correct minor typos or mistakes
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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
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indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
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