fix(shell): on Windows :make does not echo #22728

Problem:
On Windows, :make does not display the output of the program it runs.
The cause is the default 'shellpipe'.  On Linux, nvim uses `tee` to redirect the
output to both stdout and the error file.  In Windows, for both cmd.exe and
powershell, the output is only redirected to the error file.

Solution:
- On Windows, change the 'shellpipe' default to "2>&1| tee".
    - Nvim includes `tee` in its Windows package.
- Document recommended defaults for powershell.

Fixes #12910

1 files changed, 2 insertions, 2 deletions

diff --git a/test/functional/ex_cmds/make_spec.lua b/test/functional/ex_cmds/make_spec.lua
index bf585ee44c..f42e21e4cb 100644
--- a/test/functional/ex_cmds/make_spec.lua
+++ b/test/functional/ex_cmds/make_spec.lua
@@ -34,8 +34,8 @@ describe(':make', function()
       nvim('set_option', 'makeprg', testprg('shell-test'))
       local out = eval('execute("make")')
       -- Ensure there are no "shell returned X" messages between
-	  -- command and last line (indicating zero exit)
-      matches('LastExitCode%s+[(]', out)
+      -- command and last line (indicating zero exit)
+      matches('LastExitCode%s+ready [$]%s+[(]', out)
       matches('\n.*%: ready [$]', out)
     end)