public void indent(int paragraph) {
		String paragraphContents = codeArea.getParagraph(paragraph).getText();
		int column = 0;
		for (; column < paragraphContents.length(); column++) {
			char c = paragraphContents.charAt(column);
			if (c != ' ' && c != '\t') break;
		}
		codeArea.insert(paragraph, column, newText("\t"));
	}
Adds a tab indentation into the given paragraph.

@param paragraph
		Paragraph to indent.
recaf-ui/src/main/java/software/coley/recaf/ui/control/richtext/Editor.java