Fix broken parameter parsing

We were mistakenly looking for lines that start with an "@" symbol,
forgetting that parameter declarations have comment symbols and
arbitrary whitespace preceeding the "@".

Author: hinerm

src/main/java/org/scijava/script/ScriptInfo.java

@@ -214,10 +214,11 @@ public void parseParameters() {
 				final String line = in.readLine();
 				if (line == null) break;
 
-				// NB: Scan for lines starting with an '@', stopping at the first line
-				// not starting with '@' with at least one alphameric character.
-				final int at = line.indexOf('@');
-				if (at >= 0 && line.substring(0, at).trim().isEmpty()) {
+				// NB: Scan for lines containing an '@' with no prior alphameric
+				// characters. This assumes that only non-alphanumeric characters can
+				// be used as comment line markers.
+				if (line.matches("^[^\\w]*@.*")) {
+					final int at = line.indexOf('@');
 					parseParam(line.substring(at + 1));
 				}
 				else if (line.matches(".*\\w.*")) break;