echo differs from GNU coreutils

[tryone144]

The bundled echo command from the coreutils module in the examples handles its parameters differently than the "usual" GNU variant.

In particular, quotes (", ') are not filtered and passed from input to output (parameter -> stdout) verbatim.
Furthermore, the -n flag to omit the trailing newline seems to be ignored (newline is always present).

The improper handling of quotes might be a result of the used "local echo" implementation (see #6) and not an issue with the coreutils modules per-se.

[tryone144]

After some further testing, it appears that neither echo from coreutils nor the "local echo" implementation is at fault here. We just don't properly parse the command line into argument parts.

[tryone144]

Proper handling of the command line input (i.e. parsing) should be handled by the shell-quote dependency newly introduced in #9.