Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetry in 37:22-38.
This was a sign of great distress. While it is often accompanies repentance, in this chapter it is intended to show the king's anger at the blasphemy of the Assyrians when they spoke against Yahweh. (See: [[rc://en/tw/dict/bible/kt/sign]] and [[rc://en/tw/dict/bible/kt/repent]] and [[rc://en/tw/dict/bible/kt/blasphemy]])
Hezekiah was different from the other kings because when he was threatened by Assyria, he went to Yahweh in prayer. He did not trust in his army or make an alliance with Egypt. (See: [[rc://en/tw/dict/bible/kt/trust]])