Equals sign seems unnecessarily escaped

[deivid-rodriguez]

In rubygems, we sometimes print quite complicated commands when building extensions fail, so that the user can try to rerun things and reproduce the problem. I noticed that equal signs are escaped, making things a bit more overwhelming.

I think there might be a reason for it that I don't know of, or some shell where it's necessary, but I checked the equivalent python package, and it does not escape them, so maybe it can be changed.

➜  ~ python -c 'import shlex; print(shlex.join(["FOO=BAR", "baz"]))'
FOO=BAR baz

➜  ~ ruby -rshellwords -e 'puts Shellwords.join(["FOO=BAR", "bar"])'
FOO\=BAR baz

If the change is accepted, I can work on it.

[deivid-rodriguez]

I just found https://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html, where = is listed as "may need to be quoted under certain circumstances". So I guess either the python library has a bug or it considers those circumstances and avoid the escaping when not necessary. So, this feature is more complicated than I thought.

[deivid-rodriguez]

Update to include the more recent version of the previous document, where the "special circumstances" should be more clear: https://pubs.opengroup.org/onlinepubs/9799919799/utilities/V3_chap02.html.