bug: arithmetic expansion can not handle nested brackets `()`
bug: description
expect: proper handling of brackets
related: #938
code: input
expect: output
Actual output ion: syntax error: syntax error: ')' at position 15 is out of place
kernel: linux5.6.3-2
version: ion --version
ion 1.0.0-alpha 1fbd29a6
Edited by matu3ba