This post contains the detailed changelog entries of Sailfish OS update 5.0.
Changelog_from_5.0.0.5_to_5.0.0.21.md (47.0 KB)
Changelog_from_5.0.0.21_to_5.0.0.29.md (10.1 KB)
Changelog_from_5.0.0.29_to_5.0.0.43.md (16.2 KB)
The release notes are here:
No markdown in the docs app ;_;
Please make a more verbose comment. Should something be fixed and how?
I think he is reffering to the fact that an md file cannot be opened on SailfishOS directly. A possibility could be to add support to the Documents app.
Workaround:
While the downloaded md file has content disposition:attachment, once downloaded you can point your browser to file:///home/defaultuser/Downloads and you can use the browser to read it
Which means you can use the browser to then save a PDF which you can read in sailfish-office/Documents. 
would still be nice to be able to save the file if you receive it as email attachment. Actually it would be nice to be able to save ANY file you receive as email attachment
I agree, it like impossible to cover all possible use cases and how people are supposedly using their downloaded files. Hence, better would be allow downloading any email attachment.
In 5.0.0, maybe already 4.6.0, the email attachments are saved in ~/Downloads when tapped on, no matter if there is something to open it or not.
Md documents rendering is not supported it seems.
Downloading email attachments has been possible for me? 
I just tried, in 4.6 I definitely can’t download attachments with unsupported extensions. But nice that my wish is already fulfilled in 5 - just have to wait a bit
I noticed that Slovenian languge was not updated again.
It seems that the last update for l10n of 5 was not imported.
Pull requests welcome 
Ok, so it will come when 5.0.0 will be out.
It’s still not very intuitive. For attachments that don’t have any application to use them, there is still the message that the file cannot be opened. It is saved though. I wanted to change this notification message to display that there is nothing to open the file, but that it is saved anyway, but this notification is not handled by the email application. It is triggered by the QML call openExternally() (or something like that). This call is returning a boolean, but the documentation explain that this boolean just means that the call has been succesfully sent to xdg-open or something equivalent. Not that xdg-open can actually open the file or not.
So not very easy to discover…
For markdown there is Notizen.md app (in openrepos) but don’t have support for opening markdown file from another app.