cmdarg_info had no test coverage, plz2fix

tests/test_info.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/bash4
+
+source $(dirname ${BASH_SOURCE[0]})/../cmdarg.sh
+
+function shunittest_info_reject_invalid
+{
+    cmdarg_purge
+    cmdarg_info INVALID_SECTION || return 0
+}
+
+function shunittest_info_accept_valid
+{
+    set -e
+    cmdarg_purge
+    cmdarg_info header 'Some header from the info'
+    cmdarg_parse --help 2>&1 | grep 'Some header from the info'
+    set +e
+}