The currently suggested vim modeline formatting string to allow .livemd
files to render as markdown on GitHub works, but confuses vim itself.
```
<!-- vim: syntax=markdown -->
```
When opening a .livemd file with the suggested modeline in vim it errors
when it tries to parse `-->` as a modeline option.
e.g.
```
"2021/day2.livemd" 81L, 1616B
Error detected while processing modelines:
line 1:
E518: Unknown option: -->
```
The fix is to replace the suggested vim modeline
```
<!-- vim: syntax=markdown -->
```
With a modeline declaration format that indicates when the modeline
options are complete, allowing vim to ignore the rest of the line.
```
<!-- vim: set syntax=markdown: -->
```
Reference
- vim issue: https://github.com/vim/vim/issues/1648
- especially this comment: https://github.com/vim/vim/issues/1648#issuecomment-296386153Fixes#773
* Fix error on back after closing session
Clicking the browsers back button after closing a session
resulted in an error since it was trying to close an already closed notebook
* Overwrite back history on section delete
* Make cell status italic when content changed
* Add Ctrl+Shift+Enter for evaluating all cells
* Improve the behaviour of evaluating all cells
* Fix typo
* Add keywords to completion
* Fix signature request caching for call without parentheses
* Don't insert parentheses for def* macros
* Don't trigger missing runtime message when auto completion is enabled
* Don't insert parentheses for keyword macros
* Improve completion of env macros
* Apply review comments
* Update locals without parentheses
* Apply suggestions from code review
Co-authored-by: José Valim <jose.valim@dashbit.co>
* Format
Co-authored-by: José Valim <jose.valim@dashbit.co>
* Improve file select layout on long paths
* Automatically back up notebooks without a file
* Run formatter
* Add margin when there are no sections
* Add an informative note about autosave directory
* Store autosave path instead of file in the config
* Rename autosave dir to autosave path
* Fix insert mode escape on section headlines
* Show ellipsis on selected file too
* Always create the default directory
* Apply review comments
* Update webpack.config.js
Allows for xml syntax highlighting in markdown cells
* Extend theme to cover XML and JSON specific tokens
* Refactor theme colors into a single palette
Co-authored-by: Jonatan Kłosko <jonatanklosko@gmail.com>
