Omitted variables not being marked as such

[NilsEnevoldsen]

. sysuse auto, clear
(1978 Automobile Data)

. gen lowrep = rep78<4

. eststo areg : qui areg price lowrep, a(rep78)

. matlist e(b)

             |         o.           
             |    lowrep      _cons 
-------------+----------------------
          y1 |         0   6146.043 

. eststo reghdfe : qui reghdfe price lowrep, a(rep78)

. matlist e(b)

             |    lowrep 
-------------+-----------
          y1 |         0 

. esttab areg reghdfe, nocons nobase noomit

--------------------------------------------
                      (1)             (2)   
                    price           price   
--------------------------------------------
lowrep                                  0   
                                      (.)   
--------------------------------------------
N                      69              69   
--------------------------------------------
t statistics in parentheses
* p<0.05, ** p<0.01, *** p<0.001

Note that areg prefixes omitted variables with o., whereas reghdfe does not.

I believe this used to work correctly.

[NilsEnevoldsen]

For historical interest: #24.

[sergiocorreia]

I'm pushing a commit that should address this. Of course, we know from past experience that it's hard to get these things right, so let me know if you find anything else.