bug#61072: How to change the length of the separation lines in eldoc, used by eglot?

[Wei-Ting Lin]

I prefer to have the information shown near the cursor, when it hovers on a symbol. I use eldoc-doc for this purpose, and the result is like this.

As seen in the screenshot, the line is too long for the child frame and gets wrapped. How can I change the length of the line?

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This issue was posted in https://github.com/joaotavora/eglot/discussions/1157 originally.