t/10-run.t fails on newer FreeBSD systems

[eserte]

On my freebsd 11+12 smokers the test suite fails:

    #   Failed test 'Commit the changes.'
    #   at t/10-run.t line 100.
    # died: fatal: empty string is not a valid pathspec. please use . instead if you meant to match all paths at t/10-run.t line 94.
    
    #   Failed test 'The commit failed with an error message.'
    #   at t/10-run.t line 113.
    #                   undef
    #     doesn't match '(?^:x\ Test\ plugin\ \-\ custom\ return\ codes\.)'
Use of uninitialized value $exit_status in numeric ne (!=) at t/10-run.t line 122.
    
    #   Failed test 'Retrieve the commit message.'
    #   at t/10-run.t line 134.
    # died: fatal: your current branch 'master' does not have any commits yet at t/10-run.t line 132.
    
    #   Failed test 'The pre-commit errors are embedded in the commit message.'
    #   at t/10-run.t line 138.
    #                   undef
    #     doesn't match '(?^:x\ Test\ plugin\ \-\ custom\ return\ codes\.)'
    # Looks like you failed 4 tests of 6.

#   Failed test 'Commit without --no-verify.'
#   at t/10-run.t line 145.
# Looks like you failed 1 test of 2.
t/10-run.t .......... 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/2 subtests 

git version installed here: 2.16.1 or 2.16.2, which is newer than on my other smoker systems.

[eserte]

Fails also on Ubuntu 18.04 (git 2.17.1).

[eserte]

Yes, it's git. There are no pass reports anymore since git 2.16.1. Statistical analysis (theta=-1 means "bad"):

****************************************************************
Regression 'qr:# git version (\S+)'
****************************************************************
Name                   Theta          StdErr     T-stat
[0='const']           1.0000          0.0104      96.31
[1='eq_1.7.1']       -0.0000          0.0215      -0.00
[2='eq_1.8.3.1']              0.0000          0.0235       0.00
[3='eq_2.1.4']       -0.0000          0.0168      -0.00
[4='eq_2.11.0']      -0.0465          0.0165      -2.81
[5='eq_2.15.1']      -0.0000          0.0434      -0.00
[6='eq_2.16.1']      -1.0000          0.0360     -27.80
[7='eq_2.16.2']      -1.0000          0.0360     -27.80
[8='eq_2.17.1']      -1.0000          0.0275     -36.40
[9='eq_2.17.2']      -1.0000          0.0265     -37.78
[10='eq_2.18.2']             -1.0000          0.0850     -11.77
[11='eq_2.19.1']             -1.0000          0.0335     -29.82
[12='eq_2.19.2']             -1.0000          0.0850     -11.77
[13='eq_2.20.1']             -1.0000          0.0300     -33.36
[14='eq_2.21.0']             -1.0000          0.0235     -42.54
[15='eq_2.24.1']             -1.0000          0.0605     -16.52
[16='eq_2.25.0']             -1.0000          0.0335     -29.82
[17='eq_2.7.4']       0.0000          0.0224       0.00

R^2= 0.967, N= 286, K= 18