private String getSpaces(int numSpaces) {
		if (numSpaces <= 0) {
			return "";
		}
		StringBuffer buf = new StringBuffer(numSpaces);
		for (int i = 0; i < numSpaces; i++) {
			buf.append(" ");
		}
		return buf.toString();
	}
Creates a formatted difference string for an individual line difference
between program1 and program2.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramDiffDetails.java