Hanging indent

Two paragraphs have suddenly become formatted as hanging indents. I don’t want this, and don’t know how I did it. How did I? And how do I get rid of it?

There are so many ways to do that, that it would truly be difficult to speculate how. Just put your cursor in a “normal” paragraph, press Cmd-Ctrl-C, and then select the two indented paragraphs and press Cmd-Ctrl-V. Those two commands copy and paste ruler styles, which are what define indents and so forth.