workaround trouble from fix to #7845 with line endings

for any individuals who happen to check out test/lineedit.jl with a poorly
configured windows git, or make changes to the file in an antique editor

cc @Keno this should still capture the same test, if I revert the `base/LineEdit.jl` part of 75ec2a3994f9cbfe8c1a94d20c4e651d0cb41165 then it does fail as expected on Linux