Issue #10914: Add a minimal embedding test to test_capi.

diff --cc .hgignore
index bba99a46e97634559fe865c0b14e6b06e912557f,e5e149fba5ccacd54a130b79d4bfae66c2d38c14..7bb2457d11b16068b724acf14db649a5179cae72
--- 1/.hgignore
--- 2/.hgignore
+++ b/.hgignore
@@@ -64,8 -62,6 +64,9 @@@ PCbuild/*.ex
  PCbuild/*.o
  PCbuild/*.ncb
  PCbuild/*.bsc
 +PCbuild/*.user
 +PCbuild/*.suo
  PCbuild/Win32-temp-*
 +PCbuild/x64-temp-*
  __pycache__
+ Modules/_testembed

diff --cc Makefile.pre.in
Simple merge

diff --cc Misc/NEWS
index d6285161166114b96ec8ce840352a2522fe9688a,f4a4c5258eb13a4b40266b921e88e3590af7784e..bba2ac6d8ef341441beb73610ebea86bf38afa6d
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -504,12 -281,8 +504,14 @@@ Extension
  Tests
  -----
  
+ - Issue #10914: Add a minimal embedding test to test_capi.
+ 
 +- Issue #11223: Skip test_lock_acquire_interruption() and
 +  test_rlock_acquire_interruption() of test_threadsignals if a thread lock is
 +  implemented using a POSIX mutex and a POSIX condition variable. A POSIX
 +  condition variable cannot be interrupted by a signal (e.g. on Linux, the
 +  futex system call is restarted).
 +
  - Issue #11790: Fix sporadic failures in test_multiprocessing.WithProcessesTestCondition.
  
  - Fix possible "file already exists" error when running the tests in parallel.