So, I've run into what may - or may not - be a bug that began in 6.10 beta 2: throughout countless notes that I've written by hand - ampersands are converted into their html markup version. So, text that was written in a note as:
salt '' cmd.run 'cd /usr/local/src && tar -xzf monit-5.20.0.tar.gz && cd monit-5.20.0 && (etc)
when copied and then pasted becomes:
salt '' cmd.run 'cd /usr/local/src && tar -xzf monit-5.15.tar.gz && cd monit-5.15 &&
This seems to happen if any text styling was applied to the text after the fact - put the highlighter on it, make it bold, whatever. The problem is that it never used to do this. I have hundreds of notes with text formatting employed in some circumstances and not in others. Sure, I can strip off the formatting and then copy - but if there was specific formatting (say, for a pdf document publishing internally for staff) then it mucks that up for future revisions.
Now, it occurs to me that this change in behavior may have coincided with upgrading my MBP to MacOS Sierra - but I can't find any mention online of changes to how text is pulled to the clipboard (besides their 'universal clipboard' thing, which I don't employ).
oh - and on the off chance my examples above get morphed by any formatting in *this* text editor, I've attached screenshots.
(edit - I suppose this may fall under the 'paste and match style' issues above that others have reported...but I'm not entirely certain)