Missing string join method added

platform/util/src/com/intellij/openapi/util/text/StringUtil.java

@@ -1087,6 +1087,22 @@ public class StringUtil {
     return result.toString();
   }
 
+  @NotNull
+  public static String join(final String... strings) {
+    if (strings == null || strings.length == 0) return "";
+
+    final StringBuilder builder = StringBuilderSpinAllocator.alloc();
+    try {
+      for (final String string : strings) {
+        builder.append(string);
+      }
+      return builder.toString();
+    }
+    finally {
+      StringBuilderSpinAllocator.dispose(builder);
+    }
+  }
+
   @NotNull
   public static String stripQuotesAroundValue(@NotNull String text) {
     if (startsWithChar(text, '\"') || startsWithChar(text, '\'')) text = text.substring(1);