View source for Score testing

[[File:Score_PNG_output_in_dark_theme.png|thumb|Unreadable Score extension output in dark mode]]
Hopefully I can get the Score extension working to [https://phabricator.wikimedia.org/T49578 produce SVG output], instead of the transparent PNG image that needs a white background styling for dark mode otherwise it's unreadable.

== Examples ==
Range of the [https://en.wikipedia.org/wiki/Contrabass_trombone contrabass trombone], as used on Wikipedia:
<score lang="lilypond">
  {
    \new Staff \with { \remove "Time_signature_engraver" }
    \clef bass \key c \major \cadenzaOn
    \ottava #-1 \tweak font-size #-2 fis,,,1 \finger \markup \text "poss."
    \ottava #0  c,,1 \glissando d'1
    \tweak font-size #-2 f'1
  }
</score>

The Spear motif from ''Das Rheingold'':

<score lang="lilypond">
  \layout { ragged-right = ##t \context { \Score \omit BarNumber } }
  \relative g {
    \override DynamicTextSpanner.style = #'none
    \override Hairpin.minimum-length = #5
    \clef bass \key c \major
    g2~ \ff g8 f8 e8. d16
    c4 b a g  f e d c  \break
    b a g f  e1~ \dim\!  << e1~ { s2 s4 s4 \> } >>  e4 \! \p r4 r2
  }</score>

The Summit from ''Eine Alpensinfonie'', which may or may not be a contrabass trombone excerpt, but probably ought to be:

<score>
\relative c, {
  \time 4/4
  \clef bass
  \key c \major

  r2 r4\ff g\tenuto
  c2.\tenuto c4\tenuto
  g'2.\tenuto g4\tenuto
  c1
  e2~ e4.. b16
  a1
  g1
  c8 r8 r4 r2
  \bar "|."
} 
</score>