vim-patch:9.2.0458: Crash with invalid shellredir/shellpipe value (#39691)

Problem:  Crash with invalid shellredir/shellpipe value
          (bfredl)
Solution: Validate the option and allow only a single "%s".

fixes:  vim/vim#20157
closes: vim/vim#20159

84ae09dd79

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

runtime/lua/vim/_meta/options.gen.lua

@@ -5918,6 +5918,7 @@ vim.go.shcf = vim.go.shellcmdflag
 --- 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").
+--- Only a single "%s" value is allowed.
 ---
 --- @type string
 vim.o.shellpipe = "| tee"
@@ -5960,6 +5961,8 @@ vim.go.shq = vim.go.shellquote
 --- explicitly set before.
 --- In the future pipes may be used for filtering and this option will
 --- become obsolete (at least for Unix).
+--- 							*E1577*
+--- Only a single "%s" item is allowed in the option value.
 ---
 --- @type string
 vim.o.shellredir = ">"