additional backslash when exporting equations with subscript

[xibeisiber]

Hi,
in my TeXmacs document I write an equation such as $\pi_3=\pi_1+\pi_2$, and export it as markdown file. the equation becomes $\pi \_{3} = \pi \_{1} + \pi \_{2}$.

There is additional backslash before subscript "_".. how can I get the right format?

I'm using TeXmacs 2.1.2 on ubuntu 20.04.

Thanks!

[mdbenito]

The backslash is required for certain markdown renderers which interpret it as italics even when in math mode. This done in

markdown/progs/tmmarkdown.scm

Lines 368 to 369 in 9ef3792

	(,(cut func? <> '!sub) .
	,(lambda (x) (cons "\\_" (md-math* (cdr x)))))

I guess this should be optional but for now you can simply remove the double backslash in the second line:

(,(cut func? <> '!sub) . 
   ,(lambda (x) (cons "_" (md-math* (cdr x)))))