You can use place
to add content without affecting the layout of other content:
#let accent = context place(
dx: -measure(sym.triangle.stroked.r).width - 0.5em,
sym.triangle.stroked.r,
)
#accent #lorem(30)
(If using a fixed symbol like in this example, I would get rid of the context
and measure
and just tune the -0.5em
to my liking.)
I think this works fine if you use place
at the start of a paragraph. In the middle of a paragraph it would break the paragraph in two. In this case you’d have to take extra precautions as documented here (this will be in the documentation of the next release i.e. typst 0.12.0).