[json] IJPL-63669: fix adding comma at the end of the last item while reformating json with too long lines

(cherry picked from commit b0bbe0e292849ffe85e96d337e05efc42c3cd234)

IJ-MR-189563

GitOrigin-RevId: 8d5be58453f3c4ddfdb36ab3faa985107c46f306

json/backend/tests/test/com/intellij/json/JsonFormattingTest.java

@@ -40,6 +40,12 @@ public class JsonFormattingTest extends JsonTestCase {
     doTest();
   }
 
+  public void testWrappingWhenLineIsTooLong() {
+    getCodeStyleSettings().setRightMargin(JsonLanguage.INSTANCE, 20);
+    getCodeStyleSettings().getCommonSettings(JsonLanguage.INSTANCE).WRAP_LONG_LINES = true;
+    doTest();
+  }
+
   // WEB-13587
   public void testAlignPropertiesOnColon() {
     checkPropertyAlignment(PropertyAlignment.ALIGN_ON_COLON);

json/backend/tests/testData/formatting/WrappingWhenLineIsTooLong.json

@@ -0,0 +1,3 @@
+{
+  "test": "very very very very very very very looooong line"
+}

json/backend/tests/testData/formatting/WrappingWhenLineIsTooLong_after.json

@@ -0,0 +1,3 @@
+{
+  "test": "very very very very very very very looooong line"
+}

platform/platform-impl/src/com/intellij/formatting/LineWrappingUtil.java

@@ -132,7 +132,8 @@ public final class LineWrappingUtil {
           // No point in splitting line when its left part contains only white spaces, example:
           //    line start -> |                   | <- right margin
           //                  |   aaaaaaaaaaaaaaaa|aaaaaaaaaaaaaaaaaaaa() <- don't want to wrap this line even if it exceeds right margin
-          || CharArrayUtil.shiftBackward(text, startLineOffset, wrapOffset - 1, " \t") < startLineOffset) {
+          || CharArrayUtil.shiftBackward(text, startLineOffset, wrapOffset - 1, " \t") < startLineOffset
+          || wrapOffset <= startLineOffset || wrapOffset >= endLineOffset) {
         continue;
       }