patch 9.0.1886: Various Typos

Problem:  Various Typos
Solution: Fix Typos

This is a collection of typo related commits.

closes: #12753
closes: #13016

Co-authored-by: Adri Verhoef <a3@a3.xs4all.nl>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Co-authored-by: Viktor Szépe <viktor@szepe.net>
Co-authored-by: nuid64 <lvkuzvesov@proton.me>
Co-authored-by: Meng Xiangzhuo <aumo@foxmail.com>
Co-authored-by: Dominique Pellé <dominique.pelle@gmail.com>

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_vimscript.vim b/src/testdir/test_vimscript.vim
index 002d115..0c4aedb 100644
--- a/src/testdir/test_vimscript.vim
+++ b/src/testdir/test_vimscript.vim
@@ -3105,7 +3105,7 @@
 "	    should be given.
 "
 "	    This test reuses the function MESSAGES() from the previous test.
-"	    This functions checks the messages in g:msgfile.
+"	    This function checks the messages in g:msgfile.
 "-------------------------------------------------------------------------------
 
 func Test_nested_while_error()
@@ -3230,7 +3230,7 @@
 "	    error messages should be given.
 "
 "	    This test reuses the function MESSAGES() from the previous test.
-"	    This functions checks the messages in g:msgfile.
+"	    This function checks the messages in g:msgfile.
 "-------------------------------------------------------------------------------
 
 func Test_nested_cont_break_error()
@@ -3336,7 +3336,7 @@
 "	    should be given.
 "
 "	    This test reuses the function MESSAGES() from the previous test.
-"	    This functions checks the messages in g:msgfile.
+"	    This function check the messages in g:msgfile.
 "-------------------------------------------------------------------------------
 
 func Test_nested_endtry_error()