Copying and pasting cells in gmail corrupts table border formatting. Problem didn't exist in Excel.
Steps to Reproduce:
1.Format a cells with both outer and inner borders
2.Copy formatted cells
3.Paste in gmail
Inner lines of a table appear thicker compared to outside. Looks like double cell borders
All tables borders should be the same thickness
User Profile Reset: Yes
Created attachment 146183 [details]
Visual of a problem
Linux Mint 19
Build ID: 1647bc1309dcd313dff2614f4844b71b1c558dee
CPU threads: 2; OS: Linux 4.15; UI render: default; VCL: gtk3;
Locale: en-US (en_US.UTF-8); Calc: threaded
Confirmed but super minor issue.
You can do additional work to help resolve this problem. First and foremost, you could check against LibreOffice 3.3 to see if this is a regression or if it was inherited from OOo. If it's a regression, there are additional steps we can do to help triage the problem for a developer.