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<https://github.com/The-OpenROAD-Project/OpenLane/pull/1828|#1828 Yosys synth check fix>
Pull request opened by <https://github.com/kareefardi|kareefardi>
Fix doctest  
Delimt end of warning by final message emitted by yosys in addition to the keyword `warning`

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Fixes <https://github.com/The-OpenROAD-Project/OpenLane/issues/1822|#1822>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>
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<https://github.com/The-OpenROAD-Project/OpenLane/pull/1828|#1828 Yosys synth check fix>
Pull request ready for review by <https://github.com/kareefardi|kareefardi>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>

<https://github.com/The-OpenROAD-Project/OpenLane/pull/1828|#1828 Yosys synth check fix>
Pull request merged by <https://github.com/kareefardi|kareefardi>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>