ScriptInfo: ignore lines not _starting_ with @

This fixes a problem when executing scripts such as:

    /*
    arf@aol.com
    */
    print("Hello");

See:
https://list.nih.gov/cgi-bin/wa.exe?A2=ind1407&L=IMAGEJ&F=&S=&P=71357

Author: ctrueden

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

@@ -214,10 +214,12 @@ public void parseParameters() {
 				final String line = in.readLine();
 				if (line == null) break;
 
-				// scan for lines containing an '@' stopping at the first line
-				// containing at least one alphameric character but no '@'.
+				// 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) parseParam(line.substring(at + 1));
+				if (at >= 0 && line.substring(0, at).trim().isEmpty()) {
+					parseParam(line.substring(at + 1));
+				}
 				else if (line.matches(".*\\w.*")) break;
 			}
 			if (reader == null) in.close();