fix test file

Signed-off-by: TennyZhuang <[email protected]>

src/sqlparser/tests/testdata/select.yaml

@@ -166,7 +166,7 @@
   formatted_sql: SELECT 'a' LIKE 'a'
   formatted_ast: 'Query(Query { with: None, body: Select(Select { distinct: All, projection: [UnnamedExpr(Like { negated: false, expr: Value(SingleQuotedString("a")), pattern: Value(SingleQuotedString("a")), escape_char: None })], from: [], lateral_views: [], selection: None, group_by: [], having: None }), order_by: [], limit: None, offset: None, fetch: None })'
 - input: select 'a' like 'a' escape '\';
-  formatted_sql: SELECT 'a' LIKE 'a' ESCAPE ''\''
+  formatted_sql: SELECT 'a' LIKE 'a' ESCAPE '\'
   formatted_ast: 'Query(Query { with: None, body: Select(Select { distinct: All, projection: [UnnamedExpr(Like { negated: false, expr: Value(SingleQuotedString("a")), pattern: Value(SingleQuotedString("a")), escape_char: Some(EscapeChar(Some(''\\''))) })], from: [], lateral_views: [], selection: None, group_by: [], having: None }), order_by: [], limit: None, offset: None, fetch: None })'
 - input: select 'a' not like ANY(array['a', null]);
   formatted_sql: SELECT 'a' NOT LIKE SOME(ARRAY['a', NULL])