Auto-Formatting does indentation on thing that it should not indent

Hello everyone,

I am currently creating a plugin to support Eiffel language in Intellij Idea and I am stuck with a problem in the formatting model. To show the problem, I created a branch in my repo here: https://gitlab.com/tioui/intelleiffel/-/tree/formatting_bug?ref_type=heads

Here the description of the problem. There is wrong auto-formatting that is done. I did not program those formatting (well maybe I did and I don't know that).

I use a basic formatting block that does not indent anything (this is a minimal example of course) : https://gitlab.com/tioui/intelleiffel/-/blob/formatting_bug/src/main/java/net/libreti/intelleiffel/formatter/EiffelBlock.java?ref_type=heads

The FormattingModelBuilder is also minimal: https://gitlab.com/tioui/intelleiffel/-/blob/formatting_bug/src/main/java/net/libreti/intelleiffel/formatter/EiffelFormattingModelBuilder.java?ref_type=heads

Then, I use the formatter with this Eiffel code:

test     (an_argument:STRING)
         -- Documentation
         do
                if an_argument ~ "Hello" then
      print("Hello")
end
             end

Normally, it should give something like that, since it should not indent anything:

test     (an_argument:STRING)
-- Documentation
do
if an_argument ~ "Hello" then
print("Hello")
end
end

But the result I have it like that:

test     (an_argument:STRING)
         -- Documentation
         do
         if an_argument ~ "Hello" then
            print("Hello")
         end
         end

It seems to try to follow the arguments parenthesis for an obscure reason. It also correctly (or magically) manage the body of the if conditional.

If anyone can give me a hint about what could go wrong; I would really appreciate it.

Note that the minimal Eiffel code is there: https://gitlab.com/tioui/intelleiffel/-/blob/formatting_bug/test_eiffel/class_a.e?ref_type=heads