Fix SVG validation error (#236)
Fix SVG validation error (#236)

Attribute "xmlns" is not allowed to appear in element "symbol".
Passw/Passw.github.io,cgerke/cgerke.github.io,jekyll/minima,Passw/Passw.github.io,jekyll/minima,Passw/Passw.github.io,jekyll/minima,horaceho/horaceho.github.io,cgerke/cgerke.github.io,horaceho/horaceho.github.io,cgerke/cgerke.github.io,horaceho/horaceho.github.io