fix scala style.

sql/catalyst/src/main/scala/org/apache/spark/sql/errors/QueryCompilationErrors.scala

@@ -351,10 +351,11 @@ private[sql] object QueryCompilationErrors extends QueryErrorsBase with Compilat
     )
   }
 
-  def trimCollationNotEnabledError() : Throwable = {
+  def trimCollationNotEnabledError(): Throwable = {
     new AnalysisException(
       errorClass = "UNSUPPORTED_FEATURE.TRIM_COLLATION",
-      messageParameters = Map.empty)
+      messageParameters = Map.empty
+    )
   }
 
   def unresolvedUsingColForJoinError(

sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala

@@ -761,9 +761,11 @@ object SQLConf {
 
   lazy val TRIM_COLLATION_ENABLED =
     buildConf("spark.sql.collation.trim.enabled")
-      .doc("Trim collation feature is under development and its use should be done under this" +
+      .doc(
+        "Trim collation feature is under development and its use should be done under this" +
         "feature flag. Trim collation trims leading, trailing or both spaces depending of" +
-        "specifier (LTRIM, RTRIM, TRIM).")
+        "specifier (LTRIM, RTRIM, TRIM)."
+      )
       .version("4.0.0")
       .booleanConf
       .createWithDefault(Utils.isTesting)

sql/core/src/test/scala/org/apache/spark/sql/CollationSuite.scala

@@ -52,12 +52,13 @@ class CollationSuite extends DatasourceV2SQLBase with AdaptiveSparkPlanHelper {
       "unicode_ltrim_ci",
       "utf8_lcase_trim",
       "utf8_binary_rtrim"
-    ).foreach {
-      collationName =>
-        checkAnswer(sql(s"select 'aaa' collate $collationName"), Row("aaa"))
-        val collationId = CollationFactory.collationNameToId(collationName)
-        assert(sql(s"select 'aaa' collate $collationName").schema(0).dataType
-          == StringType(collationId))
+    ).foreach { collationName =>
+      checkAnswer(sql(s"select 'aaa' collate $collationName"), Row("aaa"))
+      val collationId = CollationFactory.collationNameToId(collationName)
+      assert(
+        sql(s"select 'aaa' collate $collationName").schema(0).dataType
+        == StringType(collationId)
+      )
     }
   }
 
@@ -70,12 +71,13 @@ class CollationSuite extends DatasourceV2SQLBase with AdaptiveSparkPlanHelper {
       "uNiCoDE_ltRIm_cI",
       "UtF8_lCaSE_tRIM",
       "utf8_biNAry_RtRiM"
-    ).foreach {
-      collationName =>
-        checkAnswer(sql(s"select 'aaa' collate $collationName"), Row("aaa"))
-        val collationId = CollationFactory.collationNameToId(collationName)
-        assert(sql(s"select 'aaa' collate $collationName").schema(0).dataType
-          == StringType(collationId))
+    ).foreach { collationName =>
+      checkAnswer(sql(s"select 'aaa' collate $collationName"), Row("aaa"))
+      val collationId = CollationFactory.collationNameToId(collationName)
+      assert(
+        sql(s"select 'aaa' collate $collationName").schema(0).dataType
+        == StringType(collationId)
+      )
     }
   }
 
@@ -88,10 +90,11 @@ class CollationSuite extends DatasourceV2SQLBase with AdaptiveSparkPlanHelper {
       "unicode_ci_ltrim",
       "utf8_lcase_trim",
       "utf8_binary_rtrim"
-    ).foreach {
-      collationName =>
-        checkAnswer(
-          sql(s"select collation('aaa' collate $collationName)"), Row(collationName.toUpperCase()))
+    ).foreach { collationName =>
+      checkAnswer(
+        sql(s"select collation('aaa' collate $collationName)"),
+        Row(collationName.toUpperCase())
+      )
     }
   }
 
@@ -104,11 +107,15 @@ class CollationSuite extends DatasourceV2SQLBase with AdaptiveSparkPlanHelper {
 
   test("collate function syntax with default collation set") {
     withSQLConf(SqlApiConf.DEFAULT_COLLATION -> "UTF8_LCASE") {
-      assert(sql(s"select collate('aaa', 'utf8_lcase')").schema(0).dataType ==
-        StringType("UTF8_LCASE"))
+      assert(
+        sql(s"select collate('aaa', 'utf8_lcase')").schema(0).dataType ==
+        StringType("UTF8_LCASE")
+      )
       assert(sql(s"select collate('aaa', 'UNICODE')").schema(0).dataType == StringType("UNICODE"))
-      assert(sql(s"select collate('aaa', 'UNICODE_TRIM')").schema(0).dataType ==
-        StringType("UNICODE_TRIM"))
+      assert(
+        sql(s"select collate('aaa', 'UNICODE_TRIM')").schema(0).dataType ==
+        StringType("UNICODE_TRIM")
+      )
     }
   }
 

sql/core/src/test/scala/org/apache/spark/sql/errors/QueryCompilationErrorsSuite.scala

@@ -873,11 +873,12 @@ class QueryCompilationErrorsSuite
       Seq(
         "CREATE TABLE t(col STRING COLLATE EN_TRIM_CI) USING parquet",
         "CREATE TABLE t(col STRING COLLATE UTF8_LCASE_TRIM) USING parquet",
-        "SELECT 'aaa' COLLATE UNICODE_LTRIM_CI",
+        "SELECT 'aaa' COLLATE UNICODE_LTRIM_CI"
       ).foreach { sqlText =>
         checkError(
           exception = intercept[AnalysisException](sql(sqlText)),
-          condition = "UNSUPPORTED_FEATURE.TRIM_COLLATION")
+          condition = "UNSUPPORTED_FEATURE.TRIM_COLLATION"
+        )
       }
     }
   }
@@ -887,14 +888,15 @@ class QueryCompilationErrorsSuite
       Seq(
         "SELECT collate('aaa', 'UNICODE_TRIM')",
         "SELECT collate('aaa', 'UTF8_BINARY_TRIM')",
-        "SELECT collate('aaa', 'EN_AI_RTRIM')",
+        "SELECT collate('aaa', 'EN_AI_RTRIM')"
       ).foreach { sqlText =>
         checkError(
           exception = intercept[AnalysisException](sql(sqlText)),
           condition = "UNSUPPORTED_FEATURE.TRIM_COLLATION",
           parameters = Map.empty,
-          context = ExpectedContext(
-            fragment = sqlText.substring(7), start = 7, stop = sqlText.length - 1))
+          context =
+            ExpectedContext(fragment = sqlText.substring(7), start = 7, stop = sqlText.length - 1)
+        )
       }
     }
   }