Crystal regex syntax highlighing breaks when #{var} is used

[OpenSauce04]

Description of the problem or steps to reproduce

While writing Crystal code, attempting to use #{var} to insert a value into a regex expression causes the syntax highlighting to treat the rest of the line as a comment.
This notably doesn't occur when the same thing is done in a string.

Specifications

Commit hash: Micro 2.0.13 from the official Gentoo repositories. (-version displays no hash)
OS: Gentoo Linux
Terminal: Wezterm

[Andriamanitra]

This is a pretty tricky issue to solve (maybe even impossible given the limitations of micro's syntax highlighting system).

Here the #{hello}/ is a comment:

p!(1/#{hello}/
2)  # prints "1 / 2 # => 0.5"

but here the exact same string is interpolating a value inside a regex:

hello = 42
p!(/#{hello}/
)  # prints "/#{hello}/ # => /42/"