Allow extend_words to specify multiple corrections

[tobiasdiez]

From reading the source code, I get the impressions that typos can already handle multiple corrections for a wrong word. However, when I try to specify the following config

[default.extend-words]
wrong = ["a", "b"]

I get

TOML parse error at line 1, column 2
  |
1 | [default.extend-words]
  |  ^^^^^^^
invalid type: sequence, expected a string

What's the correct way to specify multiple corrections?

[szepeviktor]

Currently you could only say

[default.extend-words]
wrong = ""

error: `wrong` is disallowed
  --> a:1:1
  |
1 | wrong
  | ^^^^^
  |

and contribute to the monthly Non-critical corrections issue.

[epage]

I'm open to the idea. The one thing we'd need to figure out is what happens if thr user does

[default.extend-words]
wrong = ["a", "b", "wrong"]

Note that

[default.extend-words]
right = "right"

means "this is always valid"

When we get to the implementation, I recommend serde_untagged over using #[serde(untagged)].