Follow up: This is kind of a post-processing filter to prevent inconsistent extra spaces due to different model capabilities. The above bad example happens when using the demo website model, but sometimes works fine with StarCoder-1B without this modification.

As all bad cases in #3263 have exactly one extra space in the line indent, I suggest we should only process the case of exactly one extra space in the line indent, not extra indent.
It should be allowed to have extra indents in the completion text. Consider the case of

function foo() {
║
}

and the completion is

function foo() {
├    bar();┤
}

As all bad cases in #3263 have exactly one extra space in the line indent, I suggest we should only process the case of exactly one extra space in the line indent, not extra indent. It should be allowed to have extra indents in the completion text. Consider the case of

function foo() {
║
}

and the completion is

function foo() {
├    bar();┤
}

The current version should work fine with this.