Don't freak out. Most punctuation here is totally optional. All except the single stress marker, that is, which is what you'd use as you would capital letters to mark nonstandard stress in nonlojban words.
All other marks are for transcribing speech dynamics, in fiction for dramatic effect, for example. None of them are meant to change the interpretation or meaning of the actual sentence.
Ba'ebu
The stress marker has three stages, which work on a relative scale. One dot loosely represents the difference between a normal unstressed lojban syllable and a normal stressed lojban syllable. Therefore you can play it by ear a little using the double and triple ba'ebu, for example to stress an entire world without ruining the stress pattern, use single ba'e on the unstressed syllables and double ba'e on the stressed syllable. Or perhaps a shorter method would be to use double on the stressed syllable and leave the rest, just to give it a bit more emphasis. The doesn't supercede the use of the actual word {ba'e}, as the ba'ebu dot is only for transcribing speech dynamics.
Stretching
The horizontal underline denotes pronouncing a syllable longer than normal. The line from a mid-word syllable should extend to underneath the next syllable, or at the end of the word it should finish before the next word. This is simply a visual aid, because technically even if you accidentally run the line too long you can still parse the sentence. Theres also a second way to write it (see diagram posted after this block) where the line runs under the rest of the letters for as long as you like, without introducing unnecessary space between characters. While this method is neater, it kind of defeats the intuitiveness of the marking because you have to look ahead to see how long the stretch is. Writer's discretion I guess.
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