Emacs fails to build from master at commit `` with the following error:
```
checking for tree-sitter >= 0.20.2... no
checking for tree-sitter >= 0.6.3... yes
checking for ts_set_allocator... yes
./configure: 16142: test: yes: unexpected operator
configure: error: Tree-sitter library exists but its version is too old

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/app-editors/emacs-29.0.9999/work/emacs/config.log
 * ERROR: app-editors/emacs-29.0.9999::gentoo failed (configure phase):
  *   econf failed
```

My /bin/sh is dash (POSIX compliant, not bash).

I've attached the logs for completeness, but the '==' in the
configure.ac test should become '='.