verifying issues and copy&paste problems with Firefox

[Federico Bruni]

I just want to share with the few persons who verify the issues that I 
just realized why gitk did not work for me recently.
When I copy a committish using Firefox, the committish seems perfectly 
selected, but actually it includes an initial space; so gitk considers 
invalid the committish. What is bad about gitk: you cannot go up and 
delete the space.

So gitk is not a good choice if you use Firefox.

A nice alternative, for those who use a recent (at least 3.18) Gnome 
desktop, is gitg, which allows to delete the space after the paste.
https://wiki.gnome.org/Apps/Gitg/