readonly-keyword fixer does not work for array index signatures

[geon]

{ [key: string]: { groups: ReadonlyArray<string> } }

became

{ readonly [key: streadonly groups: ReadonlyArray<string>y<string> } }

should be

{ readonly [key: string]: { readonly groups: ReadonlyArray<string> } }

[jonaskello]

@geon I tried to replicate the problem with a test, see commit above. But it passed. I guess you are using this at some other place than an interface declaration?

[geon]

Looks like you added the test for ReadonlyArray. The issue I had was with the index signatures. The errors are detected just fine, but the fixer mangled the code.

[geon]

Sent pull request: #63

[jonaskello]

Aha, perfect, now it is clear. I'll take another look. Meanwhile feel free to update the PR with a fix if you want :-).

[jonaskello]

Could be related to #24.

[geon]

I think I fixed it in https://github.com/geon/tslint-immutable/commit/fd9f87232e9b0f6591b1b73c53a13799b9c3174a