Support of bash parameter expansions

[makridi]

At the moment, when I use bash parameter expansion, the ligatures to them do not look consistent.

For example:

As you can see, the second example looks good. It seems to me that there are not enough ligatures for other expansions.

https://www.gnu.org/software/bash/manual/html_node/Shell-Parameter-Expansion.html

[mishamyrt]

That's a good case. I'll think about how to solve it. I will also try to solve the case with negative numbers in expressions like 0:-1.