Minor code cleaning.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/beatmap/BeatmapSetList.java

@@ -45,7 +45,7 @@ public class BeatmapSetList {
 
 	/** Search pattern for conditional expressions. */
 	private static final Pattern SEARCH_CONDITION_PATTERN = Pattern.compile(
-		"(ar|cs|od|hp|bpm|length|stars?)(=|==|>|>=|<|<=)((\\d*\\.)?\\d+)"
+		"(ar|cs|od|hp|bpm|length|stars?)(==?|>=?|<=?)((\\d*\\.)?\\d+)"
 	);
 
 	/** List containing all parsed nodes. */