Allow switch between several placeholder examples along with alternatives in descriptions

[EmilyGraceSeville7cf]

Given this code:

- Test if a specific ([f]ile/[d]irectory) exists:

`[ {string operator: -f, -d} {/?file some: ~/.bashrc|/?directory input: images} ]`

It should be possible to display example just for -f and for -d:

- Test if a specific [f]ile exists:

`[ -f {/?file some: ~/.bashrc} ]`

and

- Test if a specific [d]irectory exists:

`[ -d {/?directory some: ~/.bashrc} ]`

via smth like this clip-view --example-alternative 1 [. All examples are shown without --example-alternative option.

Restrictions

• All placeholders must have the same number of examples.

[EmilyGraceSeville7cf]

@kbdharun, what do u think about such idea and syntax?

[kbdharun]

@kbdharun, what do u think about such idea and syntax?

I guess it is fine

[EmilyGraceSeville7cf]

Syntax is slightly different than mentioned above. Please review it in my PR.