TEMP cause test failure

Author: ychin

.github/workflows/macvim-buildtest.yaml

@@ -374,7 +374,7 @@ jobs:
           # Currently we don't run any non-src tests, as syntax tests are fragile and prone to spamming escape codes.
           # This needs to be investigated and fixed upstream.
           # MacVim is unlikely to introduce breaking changes in runtime files anyway.
-          make ${MAKE_BUILD_ARGS} -C src test
+          make ${MAKE_BUILD_ARGS} -C src test_diff
 
       - name: Test Vim (GUI)
         if: startsWith(github.ref, 'refs/tags/') || inputs.testgui

src/testdir/test_diffmode.vim

@@ -3523,7 +3523,7 @@ func Test_diffget_diffput_diffanchors()
   1,$delete
   call setline(1, ['anchor1', '4'])
   0,1 diffget
-  call assert_equal(['2', '3', 'anchor2', '4'], getline(1, '$'))
+  call assert_equal(['1', '3', 'anchor2', '4'], getline(1, '$'))
 
   1,$delete
   call setline(1, ['anchor1', '4'])