[Docs][Bug] copy custom selection of code removes line breaks in Firefox

[auipga]

Steps to reproduce:

• go to https://zmk.dev/docs/behaviors/mod-morph (as on example)
• copy multiple lines with Ctrl+C or context menu:
  

Expected result on paste:

        gresc: grave_escape {
            compatible = "zmk,behavior-mod-morph";
            label = "GRAVE_ESCAPE";
            #binding-cells = <0>;
            bindings = <&kp ESC>, <&kp GRAVE>;
            mods = <(MOD_LGUI|MOD_LSFT|MOD_RGUI|MOD_RSFT)>;
        };

Actual result on paste:

        gresc: grave_escape {            compatible = "zmk,behavior-mod-morph";            label = "GRAVE_ESCAPE";            #binding-cells = <0>;            bindings = <&kp ESC>, <&kp GRAVE>;            mods = <(MOD_LGUI|MOD_LSFT|MOD_RGUI|MOD_RSFT)>;        };

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Details: Firefox 94.0, Linux (Archlinux)
Cross-check with Vivaldi (based on Chromium): bug not present there.

[joelspadin]

We need to pull in this fix: facebook/docusaurus#5663

[caksoylar]

This seems to be fixed now as I can't reproduce on Firefox 119.0 on Windows, possibly by the Docusaurus update in #1779. Please re-open if it is still an issue.