Separate from T347118

- Indents should appear
- The images are not rendered correctly. Spacing and alignment are not working properly. Resized images do not appear. Image tables do not appear.
- No Musical Notation appears. For example:
`<score>\relative c' { fis d fis a d f e d c cis d e a g f ees }</score>` - Complicated formulae are not displayed correctly. For example:
`<math display=block>\sum_{n=0}^\infty \frac{x^n}{n!}</math>` - Mathematical formulae do not appear properly.

<math>2x \times 4y \div 6z + 8 - \frac {y}{z^2} = 0</math> {{math|2''x'' × 4''y'' ÷ 6''z'' + 8 − {{sfrac|''y''|''z''<sup>2</sup>}} {{=}} 0}} <math>\sin 2\pi x + \ln e</math> {{math|sin 2&pi;''x'' + ln ''e''}}

- Egyptian hieroglyphs do not appear. For example:
`<hiero>P2</hiero>` - Syntax highlighting is not formatted properly with correct colors.
- Text should align appropriately and now it aligns only to the left.
- Headers should be formatted properly.