The highlight for transpose ['] operator is handled not right for Octave

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I'm using a Octave syntax extension for VS Code, which is generated from Octave.tmLanguage. Octave - Visual Studio Marketplace

And I found that the transpose operator is handled not right. The variable before the transpose operator was also recognized as part of the operator and been highlighted.

And it is handled correctly in this extension for Sublime Text 3

How to fix this?

Thanks