Method replace

ij/src/main/java/ij/macro/Functions.java:4068–4090

(String s1)

	}

	String replace(String s1) {
		s1 = getStringFunctionArg(s1);
		String s2 = getString();
		String s3 = getLastString();
		if (s2.length()==1) {
			StringBuilder sb = new StringBuilder(s1.length());
			for (int i=0; i<s1.length(); i++) {
				char c = s1.charAt(i);
				if (c==s2.charAt(0))
					sb.append(s3);
				else
					sb.append(c);
			}
			return sb.toString();
		} else {
			try {
				return s1.replaceAll(s2, s3);
			} catch (Exception e) {
				interp.error(""+e);
				return null;
			}
		}
	}

	String trim() {
		if (interp.nextToken()=='=')