Yingjie Lan

Correct line color in high contrast mode on PC

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```html x=\frac{-b\pm \sqrt{b^2-4ac}}{2a} ``` Any latex code with commands that involves lines, such as `x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}`.  ## Description On Windows PC, if you turn on high contrast mode, and...

A placeholder does not recognize function name when not typed in one go

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## Description A placeholder does not recognize a function name when not typed in one go. ### Steps to Reproduce Type in 'ex' into an empty placeholder, then jump to...