Convert legacy test for fixeol to lua test.

src/nvim/testdir/Makefile

@@ -29,7 +29,6 @@ SCRIPTS := test_eval.out                                               \
            test_charsearch.out                                         \
            test_close_count.out                                        \
            test_command_count.out                                      \
-           test_fixeol.out                                             \
 
 SCRIPTS_GUI := test16.out
 

src/nvim/testdir/test_fixeol.in

@@ -1,40 +0,0 @@
-Tests for 'fixeol'                         vim: set ft=vim :
- 
-STARTTEST
-:" first write two test files – with and without trailing EOL
-:" use Unix fileformat for consistency
-:set ff=unix
-:enew!
-awith eol:w! XXEol
-:enew!
-:set noeol nofixeol
-awithout eol:w! XXNoEol
-:set eol fixeol
-:bwipe XXEol XXNoEol
-:"
-:" try editing files with 'fixeol' disabled
-:e! XXEol
-ostays eol:set nofixeol
-:w! XXTestEol
-:e! XXNoEol
-ostays without:set nofixeol
-:w! XXTestNoEol
-:bwipe XXEol XXNoEol XXTestEol XXTestNoEol
-:set fixeol
-:"
-:" Append "END" to each file so that we can see what the last written char was.
-ggdGaEND:w >>XXEol
-:w >>XXNoEol
-:w >>XXTestEol
-:w >>XXTestNoEol
-:"
-:" Concatenate the results
-:e! test.out
-a0:$r XXEol
-:$r XXNoEol
-Go1:$r XXTestEol
-:$r XXTestNoEol
-:w
-:qa!
-ENDTEST
-

src/nvim/testdir/test_fixeol.ok

@@ -1,10 +0,0 @@
-0
-with eol
-END
-without eolEND
-1
-with eol
-stays eol
-END
-without eol
-stays withoutEND