tests: Fix some CLI tests. Add auto-stripping of newlines in the CLI output for tests that use the simple YAML string value for the expected output. Also, fix `showconfig` test to expect a root URL with a trailing slash.

#!/bin/sh

CHEF_DIR=`dirname $0`
if `hash readlink 2>&-`; then
    LINKED_EXE=`readlink $0`
    if [ -n "$LINKED_EXE" ]; then
        CHEF_DIR=`dirname $LINKED_EXE`
    fi
fi
python $CHEF_DIR/../chef.py $@