Don't use substripts in HTML if there is just a number in the
subscript: "R1", not "R<sub>1</sub>", except for characteristic
impedance. And of course still use "Z<sub>in</sub>", not "Zin".
This is also consistent with the images.
- replace "⋅" not displayed on Windows (for some reason) by "·"
- replace the double space at end of lines by the tag <br>
A translatable string cannot ends by 2 spaces, because they are not really visible
Standard apertures are circle, rect, oblong and polygon (regular polygonal shapes with 3 to 12 vertices)
The support of the standard aperture type polygon was missing in Gerber plotter.
The previous converter (maddy) is still available, during some time.
We therefore have the time to choose between them.
sundown is better to convert a md text, but is written to C
maddy has a few issues to convert a md text, but is written to C++
Both have no dependency.