vim: Import v8.2.5147

* 8.2.5147: flaky test always fails on retry
* 8.2.5146: memory leak when substitute expression nests
* 8.2.5145: exit test causes spurious valgrind reports
* 8.2.5144: with 'lazyredraw' set completion menu may be wrong
* 8.2.5143: some tests fail when using valgrind
* 8.2.5142: startup test fails if there is a status bar

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.2.5141](https://github.com/vim/vim/commit/155f2d1451949d1124bfd6ba9c55be6bd74bab75): using "volatile int" in a signal handler might be wrong\n* [8.2.5140](https://github.com/vim/vim/commit/73171ba4344e17484699d11c65d57fb1f4de572a): seachpair timeout test is flaky\n* [8.2.5139](https://github.com/vim/vim/commit/300d71881957f8e60e48eda19002ce5e25fd9c06): TIME\_WITH\_SYS\_TIME is no longer supported by autoconf\n* [8.2.5138](https://github.com/vim/vim/commit/8088ae95bbed2085c5fb196850c4e4b8df55c989): various small issues\n* [8.2.5137](https://github.com/vim/vim/commit/509ce0383105d5b516ef2d489adb7c554d3c8f81): cannot build without the +channel feature\n* [Update runtime files](https://github.com/vim/vim/commit/d799daa660b8821943cbe1682f00da9e812dd48c)
+* [8.2.5147](https://github.com/vim/vim/commit/12a49408b3d60a55b1e098f97d3f1127a75fb3bf): flaky test always fails on retry\n* [8.2.5146](https://github.com/vim/vim/commit/44ddf19ec0ff59c969658ec7d9ed42070c59c51b): memory leak when substitute expression nests\n* [8.2.5145](https://github.com/vim/vim/commit/cf801d4b95180ddaee1bf633ef482232625dd80b): exit test causes spurious valgrind reports\n* [8.2.5144](https://github.com/vim/vim/commit/c856ceb300ff8871ed546e36638f1a28531c379c): with 'lazyredraw' set completion menu may be wrong\n* [8.2.5143](https://github.com/vim/vim/commit/37bb3b111d08ce420e3cfd6ea3da3ed7428fbed1): some tests fail when using valgrind\n* [8.2.5142](https://github.com/vim/vim/commit/fa04eae5a5b9394079bde2d37ce6f9f8a5567d48): startup test fails if there is a status bar