Files marked obsolete

[Ralph Alvy]

Please excuse my lack of experience here. I’m very new to version 
control. After trying both Git and Mercurial, I found Mercurial much 
more intuitive. I’m using SourceTree with Mercurial.

After deleting 2 unnecessary source files, my SourceTree FileList shows, 
as expected, those 2 files are marked with a '-' sign. No problem. I 
assume doing a Commit with those Staged will remove them from Tracking. 
But I also see 2 new files marked with '?' that are copies of the 2 
deleted files, appended with ".obsolete" and a timestamp. What happens 
if I Stage those files before doing the Commit?