[Misc] Replace string concatenations with text blocks in encoder tests (SonarQube java:S6126)

Co-Authored-By: Kimi Code <noreply@moonshot.cn>

Author: vmassol

xwiki-commons-core/xwiki-commons-crypto/xwiki-commons-crypto-common/src/test/java/org/xwiki/crypto/internal/encoder/Base64BinaryStringEncoderTest.java

@@ -34,10 +34,11 @@ public class Base64BinaryStringEncoderTest extends AbstractBinaryStringEncoderTe
         + "biBJbmZvcm1hdGlvbmVuLg==";
 
         WRAPPED_ENCODED_BYTES =
-        "S3J5cHRvZ3JhcGhpZSAodm9uIGdyaWVjaGlzY2g6IM66z4HPhc+Az4TPjM+CLCDi" + '\n'
-            + "gJ52ZXJib3JnZW7igJwgdW5kIM6zz4HOrM+GzrXOuc69LCDigJ5zY2hyZWliZW7i" + '\n'
-            + "gJwpIGlzdCBkaWUgV2lzc2Vuc2NoYWZ0IGRlciBWZXJzY2hsw7xzc2VsdW5nIHZv" + '\n'
-            + "biBJbmZvcm1hdGlvbmVuLg==";
+            """
+            S3J5cHRvZ3JhcGhpZSAodm9uIGdyaWVjaGlzY2g6IM66z4HPhc+Az4TPjM+CLCDi
+            gJ52ZXJib3JnZW7igJwgdW5kIM6zz4HOrM+GzrXOuc69LCDigJ5zY2hyZWliZW7i
+            gJwpIGlzdCBkaWUgV2lzc2Vuc2NoYWZ0IGRlciBWZXJzY2hsw7xzc2VsdW5nIHZv
+            biBJbmZvcm1hdGlvbmVuLg==""";
     }
 
     @InjectMockComponents

xwiki-commons-core/xwiki-commons-crypto/xwiki-commons-crypto-common/src/test/java/org/xwiki/crypto/internal/encoder/HexBinaryStringEncoderTest.java

@@ -35,11 +35,13 @@ public class HexBinaryStringEncoderTest extends AbstractBinaryStringEncoderTest
                 + "7363686cc3bc7373656c756e6720766f6e20496e666f726d6174696f6e656e2e";
 
         WRAPPED_ENCODED_BYTES =
-                  "4b727970746f677261706869652028766f6e20677269656368697363683a20ce" + '\n'
-                + "bacf81cf85cf80cf84cf8ccf822c20e2809e766572626f7267656ee2809c2075" + '\n'
-                + "6e6420ceb3cf81ceaccf86ceb5ceb9cebd2c20e2809e73636872656962656ee2" + '\n'
-                + "809c2920697374206469652057697373656e7363686166742064657220566572" + '\n'
-                + "7363686cc3bc7373656c756e6720766f6e20496e666f726d6174696f6e656e2e" + '\n';
+            """
+            4b727970746f677261706869652028766f6e20677269656368697363683a20ce
+            bacf81cf85cf80cf84cf8ccf822c20e2809e766572626f7267656ee2809c2075
+            6e6420ceb3cf81ceaccf86ceb5ceb9cebd2c20e2809e73636872656962656ee2
+            809c2920697374206469652057697373656e7363686166742064657220566572
+            7363686cc3bc7373656c756e6720766f6e20496e666f726d6174696f6e656e2e
+            """;
     }
 
     @InjectMockComponents

xwiki-commons-core/xwiki-commons-crypto/xwiki-commons-crypto-common/src/test/java/org/xwiki/crypto/internal/encoder/UrlBase64BinaryStringEncoderTest.java

@@ -34,10 +34,11 @@ public class UrlBase64BinaryStringEncoderTest extends AbstractBinaryStringEncode
                 + "biBJbmZvcm1hdGlvbmVuLg..";
 
         WRAPPED_ENCODED_BYTES =
-                  "S3J5cHRvZ3JhcGhpZSAodm9uIGdyaWVjaGlzY2g6IM66z4HPhc-Az4TPjM-CLCDi" + '\n'
-                + "gJ52ZXJib3JnZW7igJwgdW5kIM6zz4HOrM-GzrXOuc69LCDigJ5zY2hyZWliZW7i" + '\n'
-                + "gJwpIGlzdCBkaWUgV2lzc2Vuc2NoYWZ0IGRlciBWZXJzY2hsw7xzc2VsdW5nIHZv" + '\n'
-                + "biBJbmZvcm1hdGlvbmVuLg..";
+            """
+            S3J5cHRvZ3JhcGhpZSAodm9uIGdyaWVjaGlzY2g6IM66z4HPhc-Az4TPjM-CLCDi
+            gJ52ZXJib3JnZW7igJwgdW5kIM6zz4HOrM-GzrXOuc69LCDigJ5zY2hyZWliZW7i
+            gJwpIGlzdCBkaWUgV2lzc2Vuc2NoYWZ0IGRlciBWZXJzY2hsw7xzc2VsdW5nIHZv
+            biBJbmZvcm1hdGlvbmVuLg..""";
     }
 
     @InjectMockComponents