patch 8.0.1302: still too many old style tests

Problem:    Still too many old style tests.
Solution:   Convert a few more tests to new style. (Yegappan Lakshmanan,
            closes #2326)

src/testdir/test_fixeol.vim

@@ -0,0 +1,48 @@
+" Tests for 'fixeol' and 'eol'
+func Test_fixeol()
+  " first write two test files – with and without trailing EOL
+  " use Unix fileformat for consistency
+  set ff=unix
+  enew!
+  call setline('.', 'with eol')
+  w! XXEol
+  enew!
+  set noeol nofixeol
+  call setline('.', 'without eol')
+  w! XXNoEol
+  set eol fixeol
+  bwipe XXEol XXNoEol
+
+  " try editing files with 'fixeol' disabled
+  e! XXEol
+  normal ostays eol
+  set nofixeol
+  w! XXTestEol
+  e! XXNoEol
+  normal 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.
+  normal ggdGaEND
+  w >>XXEol
+  w >>XXNoEol
+  w >>XXTestEol
+  w >>XXTestNoEol
+
+  call assert_equal(['with eol', 'END'], readfile('XXEol'))
+  call assert_equal(['without eolEND'], readfile('XXNoEol'))
+  call assert_equal(['with eol', 'stays eol', 'END'], readfile('XXTestEol'))
+  call assert_equal(['without eol', 'stays withoutEND'],
+	      \ readfile('XXTestNoEol'))
+
+  call delete('XXEol')
+  call delete('XXNoEol')
+  call delete('XXTestEol')
+  call delete('XXTestNoEol')
+  set ff& fixeol& eol&
+  enew!
+endfunc