#2816 Incorrect font size in the svg terminal with enhanced text mode

[PuQ]

Version: gnuplot 6.0.3
Platform: Linux

Reproduction:

reset
set term svg
set output "enhanced_text.svg"
set label '{/=36 The {y} = x^0 - {/*1 1} Line}' at -5,.1
unset border
unset tics
unset key
plot 0

set term png
set output "enhanced_text.png"
replot

unset output

Expected behavior: font size should appear like that in enhanced_text.png
Actual behavior: enhanced_text.svg