removing vertical whitespace to address #475

[finanalyst]

• I'm not sure whether this will resolve Non-Raku code examples take up a lot of vertical space #475, but the change is purely cosmetic for the code, but it may have the desired effect on final HTML output

[finanalyst]

@coke would you please review

• after thinking about Non-Raku code examples take up a lot of vertical space #475 I remembered it was similar to a problem I faced in the new website: too much white space in code blocks. The problem was white space that I had added to make the code easier to read, but which was being preserved in the final HTML output.