fix of typo for bug#35988.

mysql-test/r/div_precision_increment_func.result

@@ -77,3 +77,4 @@ id	name	salary	income_tax
 ## Dropping table t1 ##
 drop table t1;
 ## Disconnection both the connections ##
+SET @@global.div_precision_increment = 4;

mysql-test/t/div_precision_increment_func.test

@@ -19,7 +19,9 @@
 #                                                                              #
 ################################################################################
 
-SET @save_div_precision_increment = @@global.div_presision_increment;
+let $save_div_precision_increment = `SELECT @@global.div_precision_increment`
+ 
+#SET @save_div_precision_increment = @@global.div_precision_increment;
 
 --disable_warnings
 drop table if exists t1;
@@ -119,7 +121,8 @@ drop table t1;
 disconnect test_con1;
 disconnect test_con2;
 
-SET @@global.div_prescision_increment = @save_div_precision_increment;
+connection default;
+eval SET @@global.div_precision_increment = $save_div_precision_increment;