Fixup parameter expansions

[brlin-tw]

It is possible that one's home directory path contains spaces, this patch fixes most affected expansions by wrapping them with double quotes.

This PR also includes a patch to apply quoting to all parameter expansions, to help avoid alike failures in the future.

Signed-off-by: 林博仁(Buo-ren Lin) Buo.Ren.Lin@gmail.com

[oSoMoN]

This is functionally equivalent, but wouldn't it be more readable to have:

append_dir LD_LIBRARY_PATH "$RUNTIME/lib/$ARCH"

instead of:

append_dir LD_LIBRARY_PATH "$RUNTIME"/lib/"$ARCH"

[brlin-tw]

In fact, I do previously preferred the 1st style but changed my mind during generating these patches due to the search&replace friendliness and well, they are indeed functionally equivalent.

I'll switch the style soon if people felt comfortable about it.

[oSoMoN]

That's not a requirement from my end, rather a mere suggestion.
I'm curious what others think about it.

[brlin-tw]

Another argument is that word splitting simply doesn't happen at the external portions of the quoting, quoting them might give viewers a false impression of the quoting in bash scripting in general and abusing it unnecessarily.

But again this argument did appear during the generation of these patches, so comments are welcome.