8273682: Upgrade Jline to 3.20.0

Backport-of: b8cb76ad210cb3e7524c7f5b13cfe57746ac05d4

Author: zhengyu123

src/jdk.internal.le/share/classes/jdk/internal/org/jline/reader/Candidate.java

@@ -137,4 +137,9 @@ public boolean complete() {
     public int compareTo(Candidate o) {
         return value.compareTo(o.value);
     }
+
+    @Override
+    public String toString() {
+        return "Candidate{" + value + "}";
+    }
 }

src/jdk.internal.le/share/classes/jdk/internal/org/jline/reader/CompletionMatcher.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2002-2020, the original author or authors.
+ *
+ * This software is distributable under the BSD license. See the terms of the
+ * BSD license in the documentation provided with this software.
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ */
+package jdk.internal.org.jline.reader;
+
+import java.util.List;
+import java.util.Map;
+
+public interface CompletionMatcher {
+
+    /**
+     * Compiles completion matcher functions
+     *
+     * @param options LineReader options
+     * @param prefix invoked by complete-prefix or expand-or-complete-prefix widget
+     * @param line The parsed line within which completion has been requested
+     * @param caseInsensitive if completion is case insensitive or not
+     * @param errors number of errors accepted in matching
+     * @param originalGroupName value of JLineReader variable original-group-name
+     */
+    void compile(Map<LineReader.Option, Boolean> options, boolean prefix, CompletingParsedLine line
+            , boolean caseInsensitive, int errors, String originalGroupName);
+
+    /**
+     *
+     * @param candidates list of candidates
+     * @return a map of candidates that completion matcher matches
+     */
+    List<Candidate> matches(List<Candidate> candidates);
+
+    /**
+     *
+     * @return a candidate that have exact match, null if no exact match found
+     */
+    Candidate exactMatch();
+
+    /**
+     *
+     * @return a common prefix of matched candidates
+     */
+    String getCommonPrefix();
+
+}