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diff --git a/third_party/java/jopt-simple/src/main/java/joptsimple/util/KeyValuePair.java b/third_party/java/jopt-simple/src/main/java/joptsimple/util/KeyValuePair.java
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+/*
+ The MIT License
+
+ Copyright (c) 2004-2015 Paul R. Holser, Jr.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+package joptsimple.util;
+
+import static joptsimple.internal.Strings.*;
+
+/**
+ * <p>A simple string key/string value pair.</p>
+ *
+ * <p>This is useful as an argument type for options whose values take on the form {@code key=value}, such as JVM
+ * command line system properties.</p>
+ *
+ * @author <a href="mailto:pholser@alumni.rice.edu">Paul Holser</a>
+ */
+public final class KeyValuePair {
+ public final String key;
+ public final String value;
+
+ private KeyValuePair( String key, String value ) {
+ this.key = key;
+ this.value = value;
+ }
+
+ /**
+ * Parses a string assumed to be of the form {@code key=value} into its parts.
+ *
+ * @param asString key-value string
+ * @return a key-value pair
+ * @throws NullPointerException if {@code stringRepresentation} is {@code null}
+ */
+ public static KeyValuePair valueOf( String asString ) {
+ int equalsIndex = asString.indexOf( '=' );
+ if ( equalsIndex == -1 )
+ return new KeyValuePair( asString, EMPTY );
+
+ String aKey = asString.substring( 0, equalsIndex );
+ String aValue = equalsIndex == asString.length() - 1 ? EMPTY : asString.substring( equalsIndex + 1 );
+
+ return new KeyValuePair( aKey, aValue );
+ }
+
+ @Override
+ public boolean equals( Object that ) {
+ if ( !( that instanceof KeyValuePair ) )
+ return false;
+
+ KeyValuePair other = (KeyValuePair) that;
+ return key.equals( other.key ) && value.equals( other.value );
+ }
+
+ @Override
+ public int hashCode() {
+ return key.hashCode() ^ value.hashCode();
+ }
+
+ @Override
+ public String toString() {
+ return key + '=' + value;
+ }
+}