/etc/skel/.bashrc still usees the depreceted programs 'egrep' and 'fgrep'. Although these lines are commented our by default, the alias value should be changed to 'grep -E' and 'grep -F', respectively: #alias fgrep='grep -F --color=auto' #alias egrep='grep -E --color=auto' 'grep --help' says: `egrep' means `grep -E'. `fgrep' means `grep -F'. Direct invocation as either `egrep' or `fgrep' is deprecated.
In current post 3.7 Git `egrep` and `fgrep` have been made to emit obsolescence warnings: https://git.savannah.gnu.org/cgit/grep.git/commit/?id=a9515624709865d480e3142fd959bccd1c9372d1 Perhaps bump the severity a bit if this cannot be quickly fixed?