Change the syntax of the first ruby code example

The method which is not very sure of itself produces syntax error:

```ruby
test.rb:3: syntax error, unexpected tSTRING_BEG, expecting keyword_end
    logger && logger.info "Reversing the flux phase capacitance!"
                           ^
test.rb:4: syntax error, unexpected tSTRING_BEG, expecting keyword_end
    logger && logger.info "Bounding a tachyon particle b..."
                           ^
test.rb:5: syntax error, unexpected tSTRING_BEG, expecting keyword_end
    logger && logger.warn "Warning, bogon levels are rising!"