Use fenced style code block
Use fenced style code block

Fenced style code is supported by GitHub and brings two advantages:

- you do not need to check that there are always four spaces in front of
  each line. That's cumbersome if your editor removes trailing spaces by
  default.
- you can add the type of code (eg. java, bash, xml etc.) which will result
  in nicer syntax highlighting on the rendered page on GitHub.

Signed-off-by: Sven Strittmatter <ac97098edb2ecfc49e999643b23692c4c1c70ed3@weltraumschaf.de>

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