Update cct.rst to release pressure on man page formatter

[jidanni]

For #4103

Pssst, I didn't actually test it, in cct nor in man.

I suppose these newlines should be rendered as spaces and allow breaking the line.

[kbevers]

Pssst, I didn't actually test it, in cct nor in man.

Please do so.

@rouault it is unclear to me if this is a list of several URN's or just one long and complicated URN. I suspect the latter, in which case the reformatting in this PR is problematic. Correct?

[rouault]

or just one long and complicated URN

yes, this is a single URN for a concatenated operation chaining 2 coordinate operations

[kbevers]

I figured. In that case this change isn't going to cut it. @jidanni I think you'll just have to live with this quirk in the man page. Or get a wider monitor.

[jidanni]

I didn't check, but maybe these URNs should allow spaces in them near commas in the first place.

Sort of like Bourne shell sh -c arguments. You can even have newlines in its single argument.

Or maybe they're like www urls where spaces have to be replaced by pluses...