private String join(String... input) {

		char separator = ' ';
		StringBuilder buffy = new StringBuilder("");
		for (String s : input) {
			if (s == null) {
				continue;
			}
			buffy.append(s.trim()).append(separator);
		}

		String newString = buffy.toString();
		return newString.trim();
	}
Returns a concatenation of the input strings.
<p>
This is helper code for the askXxx() methods -- it concatenates string
parameters together, separated by spaces, to form the string that is
used to look up variables in .properties files.

@param input  one or more Strings to be concatenated
@return  a String representing the space-separated, concatenated input strings
Ghidra/Features/Base/src/main/java/ghidra/app/script/GhidraScript.java