Removed white space in brackets printed on the post window.

[prko]

This PR is a correct PR (based on my branch) of the following closed wrong PR (based on the develop branch):

#6105

Purpose and Motivation

The post window output of the collection's subclasses does not follow the recommended code style.
This PR makes these post-window outputs follow the recommended code style, so that users can use the post-window output in new code without removing whitespace.

Please see the following scsynth forum thread:

https://scsynth.org/t/array-recommended-style-of-code-and-how-to-return-to-the-post-window/8310

Types of changes

• minor but practical change

To-do list

• Code is tested
• All tests are passing
• Updated documentation <- not required
• This PR is ready for review

[prko]

@dyfer @cdbzb I think I did what you pointed out correctly this time, but I would ask you to check if I really did. I apologise for any inconvenience.

[dyfer]

Thanks @prko! The PR (branches etc) looks fine now.

At the dev meeting on 2023-10-08 we discussed that this PR is 1) technically a breaking change, since the generated code with .storeOn would change, but 2) since this is a whitespace change, it should not actually break any reasonably written code.

I'll pull this in now.

However, we should review other uses of storeOn/printOn to potentially provide a similar fix, for consistency. I'm planning to do that.

[dyfer]

Thanks!