The multi-line edit mode in GEdit is not working on Ubuntu 18.04. It can be activated with the combination Ctrl+Shift+C, but presently it has no consequence. The basic sanity check shows the plug-in to be installed:
$ apt search gedit-plugin-multi-edit
Sorting... Done
Full Text Search... Done
gedit-plugin-multi-edit/bionic,now 3.28.1-1 amd64 [installed,automatic]
Multi Edit plugin for gedit
What could be wrong here? Is there any other way to activate this plug-in?
Multi-line editing does work in gedit in Ubuntu 18.04.
This answer is based on an answer I posted earlier about column mode editing in gedit and is with Ubuntu 18.04.
sudo apt install gedit-plugin-multi-edit
installs the necessary plugin.Open gedit > Preferences > Plugins and enable Multi Edit.
Then, when the need arises to use Multi Edit, activate it from Tools. The mode will be reflected near the top right corner of the window.
I click similarly for the other two instances of "true" pressing Control+E each time.
Once I'm done, simply press Backspace to remove the last instance of "true". The other two instances will be simultaneously removed.
I then type "false" and it appears in all the three spots.
Turn off Multi Edit Mode from Tools once you're done.
In 19.04, the informative popup appears with Yaru as well. Ambiance still doesn't show it.