7.4.1999 brings test failures on Mac OS X

[Manuel Ortega]

`make test` results in the following on OS X 10.11.5, and patch 7.4.1999.  Didn't happen with 7.4.1997.

Executed 101 tests

1 FAILED:

Found errors in Test_evalcmd():

function RunTheTest[9]..Test_evalcmd line 17: command did not fail: call evalcmd("call NestedRedir()")

From test_alot.vim:

Found errors in Test_evalcmd():

function RunTheTest[9]..Test_evalcmd line 17: command did not fail: call evalcmd("call NestedRedir()")

Test results:

From test_alot.vim:

Found errors in Test_evalcmd():

function RunTheTest[9]..Test_evalcmd line 17: command did not fail: call evalcmd("call NestedRedir()")

TEST FAILURE

make[2]: *** [report] Error 1

make[1]: *** [test] Error 2

make: *** [test] Error 2

[Bram Moolenaar]

Fixed with 7.4.2000. Sorry.

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