Merge branch 'js/fix-open-exec'

This addresses CVE-2025-46835, Git GUI can create and overwrite a
user's files:

When a user clones an untrusted repository and is tricked into editing
a file located in a maliciously named directory in the repository, then
Git GUI can create and overwrite files for which the user has write
permission.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>

git-gui/lib/tools.tcl

@@ -130,8 +130,7 @@ proc tools_exec {fullname} {
 }
 
 proc tools_run_silent {cmd after} {
-	lappend cmd 2>@1
-	set fd [_open_stdout_stderr $cmd]
+	set fd [safe_open_command $cmd [list 2>@1]]
 
 	fconfigure $fd -blocking 0 -translation binary
 	fileevent $fd readable [list tools_consume_input $fd $after]