unnecessary_brace_in_string_interps

Avoid using braces in interpolation when not needed.

AVOID using braces in interpolation when not needed.

If you're just interpolating a simple identifier, and it's not immediately followed by more alphanumeric text, the {} can and should be omitted.

BAD:

print("Hi, ${name}!"); 

GOOD:

print("Hi, $name!"); 

To enable the unnecessary_brace_in_string_interps rule, add unnecessary_brace_in_string_interps under linter > rules in your analysis_options.yaml file:

linter:  rules:  - unnecessary_brace_in_string_interps 

If you're instead using the YAML map syntax to configure linter rules, add unnecessary_brace_in_string_interps: true under linter > rules:

linter:  rules:  unnecessary_brace_in_string_interps: true