add equals/hashCode to KeyValuePair

Signed-off-by: Ceki Gulcu <ceki@qos.ch>

slf4j-api/src/main/java/org/slf4j/LoggerFactory.java

@@ -142,8 +142,6 @@ public final class LoggerFactory {
      * It is LoggerFactory's responsibility to track version changes and manage
      * the compatibility list.
      * <p>
-     * <p>
-     * It is assumed that all versions in the 1.6 are mutually compatible.
      */
     static private final String[] API_COMPATIBILITY_LIST = new String[] { "2.0" };
 
@@ -337,7 +335,7 @@ public final class LoggerFactory {
                 }
             }
             if (!match) {
-                Util.report("The requested version " + requested + " by your slf4j binding is not compatible with "
+                Util.report("The requested version " + requested + " by your slf4j provider is not compatible with "
                                 + Arrays.asList(API_COMPATIBILITY_LIST).toString());
                 Util.report("See " + VERSION_MISMATCH + " for further details.");
             }
@@ -348,7 +346,7 @@ public final class LoggerFactory {
             // emit compatibility warnings.
         } catch (Throwable e) {
             // we should never reach here
-            Util.report("Unexpected problem occured during version sanity check", e);
+            Util.report("Unexpected problem occurred during version sanity check", e);
         }
     }
 

slf4j-api/src/main/java/org/slf4j/event/KeyValuePair.java

@@ -1,5 +1,7 @@
 package org.slf4j.event;
 
+import java.util.Objects;
+
 public class KeyValuePair {
 
     public final String key;
@@ -14,4 +16,17 @@ public class KeyValuePair {
     public String toString() {
         return String.valueOf(key) + "=\"" + String.valueOf(value) +"\"";
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if(this == o) return true;
+        if(o == null || getClass() != o.getClass()) return false;
+        KeyValuePair that = (KeyValuePair) o;
+        return Objects.equals(key, that.key) && Objects.equals(value, that.value);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(key, value);
+    }
 }