tests: fix equal_with_bash to handle appearing .coverage files

[blueyed]

Fixes #4162.

[codecov]

Codecov Report

Merging #4356 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4356      +/-   ##
==========================================
+ Coverage   95.83%   95.85%   +0.02%     
==========================================
  Files         111      111              
  Lines       24907    24910       +3     
  Branches     2431     2431              
==========================================
+ Hits        23869    23877       +8     
+ Misses        738      736       -2     
+ Partials      300      297       -3

Flag	Coverage Δ
#docs	28.88% <0%> (-0.01%)	⬇️
#doctesting	28.88% <0%> (-0.01%)	⬇️
#linting	28.88% <0%> (-0.01%)	⬇️
#linux	95.64% <100%> (+0.02%)	⬆️
#nobyte	91.85% <100%> (ø)	⬆️
#numpy	93.01% <0%> (+0.01%)	⬆️
#pexpect	41.62% <0%> (+0.01%)	⬆️
#py27	94.03% <100%> (+0.02%)	⬆️
#py34	92.16% <100%> (+0.06%)	⬆️
#py35	92.16% <100%> (+0.06%)	⬆️
#py36	93.91% <100%> (+0.02%)	⬆️
#py37	92.21% <100%> (+0.06%)	⬆️
#trial	93.01% <0%> (+0.01%)	⬆️
#windows	93.96% <0%> (-0.01%)	⬇️
#xdist	93.73% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
testing/test_argcomplete.py	68.11% <100%> (+1.44%)	⬆️
src/_pytest/terminal.py	93.02% <0%> (+0.85%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e14ca19...b51c1c3. Read the comment docs.