Thank you for this fix.

I tested after the following steps:

1. Launch SC
2. Type SinOsc in the SC‑IDE code editor
3. Press "Cmd/Ctrl" + "D"
4. In the Examples section of the HelpBrowser, double‑click XLine on the last line of the CodeMirrorContainer:

   // phase modulation (see also PMOsc)
   { SinOsc.ar(800, SinOsc.ar(XLine.kr(1, 1000, 9), 0, 2pi), 0.25) }.play;
   

5. When the Look Up Implementations window appears, press ESC
6. Press "Shift" + "Enter" to evaluate that code line

Test results:

• On Windows, it is fixed.
• On macOS, it depends on the status of SC-IDE's editor:
  • When there is no open SCD file in SC-IDE's editor:
    The complete line of the code in CodeMirrorContainer is evaluated
  • When there is one or more open SCD file/files in SC-IDE's editor:
    The complete line of the code in the activated SCD file is evaluated.