vim: Import v8.2.0251

* 8.2.0251: a couple of function return types can be more specific
* 8.2.0250: test_clear_search_pat() is unused
* 8.2.0249: MS-Windows: various warnings
* 8.2.0248: MS-Windows: dealing with deprecation is too complicated
* 8.2.0247: misleading comment in NSIS installer script

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.2.0246](https://github.com/vim/vim/commit/49c99fcca00740ae4feaba82bef4f9dc70b65318): MSVC: deprecation warnings with Ruby\n* [8.2.0245](https://github.com/vim/vim/commit/5489eab34528ba31054bc7c99af120b07f543b78): MSVC: error message if the auto directory already exists\n* [8.2.0244](https://github.com/vim/vim/commit/5f1d3ae8a8264292a53aad099e78a9b4a7bad375): compiler warning in Lua interface\n* [8.2.0243](https://github.com/vim/vim/commit/9f6277bdde97b7767ded43a0b5a2023eb601b3b7): insufficient code coverage for ex\_docmd.c functions\n* [8.2.0242](https://github.com/vim/vim/commit/799439a5d85a7d45eff7485056f2798cea766300): preview popup window test fails with long directory name
+* [8.2.0251](https://github.com/vim/vim/commit/7306d6b1c9528dcfe89eb77aa7ef354ffa9605a8): a couple of function return types can be more specific\n* [8.2.0250](https://github.com/vim/vim/commit/4f5776c17cd86f904a7e2f92db297c73e28939b7): test\_clear\_search\_pat() is unused\n* [8.2.0249](https://github.com/vim/vim/commit/3fb377fa78131004138b22a87afe33eeb7649b94): MS-Windows: various warnings\n* [8.2.0248](https://github.com/vim/vim/commit/2f189750887636fecd440d7ef353d9224e48713f): MS-Windows: dealing with deprecation is too complicated\n* [8.2.0247](https://github.com/vim/vim/commit/3b0ef8cfdbb6cb5a9cb2dc093132b78d7a52c667): misleading comment in NSIS installer script