type-named-tuple-spacing 
Expect space before the type declaration in the named tuple.
Rule Details 
Expect space before the type declaration in the named tuple.
Options 
This rule has no options.
Examples of incorrect code for this rule:
ts
/*eslint @stylistic/type-named-tuple-spacing: ["error"]*/
type T = [i:number]
type T = [i?   :number]
type T = [i:()=>void, j:number] incorrect 
Examples of correct code for this rule:
ts
/*eslint @stylistic/type-named-tuple-spacing: ["error"]*/
type T = [i: number]
type T = [i?: number]
type T = [i: ()=>void, j: number] correct