sh: Add two tests for special cases in command substitution that already

work in stable/8.

tools/regression/bin/sh/expansion/cmdsubst8.0

@@ -0,0 +1,17 @@
+# $FreeBSD$
+# Not required by POSIX (although referenced in a non-normative section),
+# but possibly useful.
+
+: hi there &
+p=$!
+q=$(jobs -l $p)
+
+# Change tabs to spaces.
+set -f
+set -- $q
+r="$*"
+
+case $r in
+*" $p "*) ;;
+*) echo Pid missing; exit 3 ;;
+esac

tools/regression/bin/sh/expansion/cmdsubst9.0

@@ -0,0 +1,11 @@
+# $FreeBSD$
+
+set -e
+
+cd /
+dummy=$(cd /bin)
+[ "$(pwd)" = / ]
+
+v=1
+dummy=$(eval v=2)
+[ "$v" = 1 ]