+grep -v '^mhshow-show-text/plain: ' "$MH" >>"$MH.new"
+mv -f "$MH.new" "$MH"
+cat >>"$MH" <<EOF
+mhshow-show-text/plain: true '%F' %F
+EOF
+
+# check parameter value quoting with text following
+msgfile=`mhpath new`
+cat >"$msgfile" <<'EOF'
+From: foo@example.edu
+To: bar@example.edu
+Subject: check parameter value quoting with text following
+MIME-Version: 1.0
+Content-Type: text/plain
+Date: Sun, 18 Dec 2005 00:52:39 +0100
+
+This is a test.
+EOF
+
+cat >"$expected" <<'EOF'
+Date: Sun, 18 Dec 2005 00:52:39 +0100
+To: bar@example.edu
+From: foo@example.edu
+Subject: check parameter value quoting with text following
+
+MIME-Version: 1.0
+
+EOF
+
+run_prog mhshow -nopause last >"$actual" 2>&1
+check "$expected" "$actual"
+
+