PDFBOX-5660: Sonar fix

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1924907 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

pdfbox/src/main/java/org/apache/pdfbox/pdmodel/common/function/type4/InstructionSequenceBuilder.java

@@ -27,7 +27,7 @@
 public final class InstructionSequenceBuilder extends Parser.AbstractSyntaxHandler
 {
     private static final Predicate<String> MATCHES_INTEGER = Pattern.compile("[\\+\\-]?\\d+").asMatchPredicate();
-    private static final Predicate<String> MATCHES_REAL = Pattern.compile("[\\-]?\\d*\\.\\d*([Ee]\\-?\\d+)?").asMatchPredicate();
+    private static final Predicate<String> MATCHES_REAL = Pattern.compile("\\-?\\d*\\.\\d*([Ee]\\-?\\d+)?").asMatchPredicate();
 
     private final InstructionSequence mainSequence = new InstructionSequence();
     private final Stack<InstructionSequence> seqStack = new Stack<>();