vim-patch:1f6faff: runtime(doc): mention the "pipefail" shell option (#35016)

related: vim/vim#17787

1f6faff912

Co-authored-by: Christian Brabandt <cb@256bit.org>

runtime/lua/vim/_meta/options.lua

@@ -5859,6 +5859,9 @@ vim.go.shcf = vim.go.shellcmdflag
 --- Don't forget to precede the space with a backslash: ":set sp=\ ".
 --- In the future pipes may be used for filtering and this option will
 --- become obsolete (at least for Unix).
+--- Note: When using a pipe like "| tee", you'll lose the exit code of the
+--- shell command.  This might be configurable by your shell, look for
+--- the pipefail option (for bash and zsh, use ":set -o pipefail").
 --- This option cannot be set from a `modeline` or in the `sandbox`, for
 --- security reasons.
 ---