Option to autofill image size
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![lena]( test/img/lena.bmp )
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<p><img src="test/img/lena.bmp" alt="lena" width="128" height="128"></p>
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![lena]( test/img/lena.bmp =200x )
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<p><img src="test/img/lena.bmp" alt="lena" width="200"></p>
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Ignore invalid pass
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![test]( invalid.bmp )
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<p><img src="invalid.bmp" alt="test"></p>
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