patch 8.0.0478: tests use assert_true(0) and assert_false(1) to report errors

Problem:    Tests use assert_true(0) and assert_false(1) to report errors.
Solution:   Use assert_report().
diff --git a/src/testdir/test_viminfo.vim b/src/testdir/test_viminfo.vim
index 7d0f157..6c0e533 100644
--- a/src/testdir/test_viminfo.vim
+++ b/src/testdir/test_viminfo.vim
@@ -450,13 +450,13 @@
   let lnum = line('.')
   while 1
     if lnum == line('$')
-      call assert_false(1, 'mark not found in Xtestfileintab')
+      call assert_report('mark not found in Xtestfileintab')
       break
     endif
     let lnum += 1
     let line = getline(lnum)
     if line == ''
-      call assert_false(1, 'mark not found in Xtestfileintab')
+      call assert_report('mark not found in Xtestfileintab')
       break
     endif
     if line =~ "^\t\""