Improve error displayed in GNU sed command when execute util/new_project.sh

[leico]

Yesterday I encounted this issue on discord. GNU implemented sed stored this message when execute util/new_project.sh

sed: can't read : No such file or directory

It causes by different implementation of sed. Current util/new_project.sh 's sed arguments assumed BSD/Darwin. For improve above issue, this change add GNU sed command and separate each process.
Old codes are commented out. If don't need their, I will remove.

[drashna]

@skullydazed, didn't we have this exact issue elsewhere recently, too?

[leico]

@drashna , @skullydazed additional information. current script is working but sed displayed those errors on Linux. I got worried this result a little. 😟
Please see my screenshot. I tried on current Linux MInt.

[drashna]

I'm not sure that this is needed anymore.

However, there are a number of merge conflicts, so you may want to update and fix this.

[leico]

Fix it. Sorry to late, and #5191 looks better.

[skullydazed]

Thanks for your work here, sorry we weren't able to get it merged before #5191 came along. We'll take a look at that one.