Fine tune curly braces block

[wdspkr]

This snippet allows for two different usages:

1. We want a block with variable:
   All we have to do is enter a {, tab twice, edit the variable name,
   tab again and write what's inside the block.
2. We want a block without variable, but with spaces inside the braces:
   So we enter a {, tab once and start to write whats inside the
   block.

Before, the latter usage resulted in the following:
{<space>mycodeinsidetheblock<space><space>}
This commit removes the second space before the closing brace.

[kevinsawicki]

Thanks for tweaking this 👍