vim-patch:8.1.2402: typos and other small things

Problem:    Typos and other small things.
Solution:   Small fixes.
f48ee3c284

.gitignore

@@ -12,6 +12,7 @@ compile_commands.json
 /tmp/
 /.clangd/
 
+.DS_Store
 *.mo
 .*.sw?
 *~

src/nvim/message.c

@@ -1378,7 +1378,7 @@ static void msg_home_replace_attr(char_u *fname, int attr)
 
 /*
  * Output 'len' characters in 'str' (including NULs) with translation
- * if 'len' is -1, output upto a NUL character.
+ * if 'len' is -1, output up to a NUL character.
  * Use attributes 'attr'.
  * Return the number of characters it takes on the screen.
  */
@@ -1501,7 +1501,7 @@ void msg_make(char_u *arg)
   }
 }
 
-/// Output the string 'str' upto a NUL character.
+/// Output the string 'str' up to a NUL character.
 /// Return the number of characters it takes on the screen.
 ///
 /// If K_SPECIAL is encountered, then it is taken in conjunction with the

src/nvim/testdir/shared.vim

@@ -314,6 +314,9 @@ func RunVimPiped(before, after, arguments, pipecmd)
     let args .= ' -S Xafter.vim'
   endif
 
+  " Optionally run Vim under valgrind
+  " let cmd = 'valgrind --tool=memcheck --leak-check=yes --num-callers=25 --log-file=valgrind ' . cmd
+
   exe "silent !" . a:pipecmd . cmd . args . ' ' . a:arguments
 
   if len(a:before) > 0

src/nvim/testdir/test49.vim

@@ -178,7 +178,7 @@ endif
 "		next Xpath value.  No new Xnext value is prepared.  The argument
 "		should be 2^(n-1) for the nth Xloop command inside the loop.
 "		If the loop has only one Xloop command, the argument can be
-"		ommitted (default: 1).
+"		omitted (default: 1).
 "
 "	- Use XloopNEXT before ":continue" and ":endwhile".  This computes a new
 "	  Xnext value for the next execution of the loop by multiplying the old