public boolean unindent(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;
		}
		if (column > 0) {
			codeArea.deleteText(paragraph, column - 1, paragraph, column);
			return true;
		}
		return false;
	}
Removes indentation from the given paragraph.

@param paragraph
		Paragraph to unindent.

@return {@code true} when there was text removed (successful unindentation).
recaf-ui/src/main/java/software/coley/recaf/ui/control/richtext/Editor.java