update en/device-dev/subsystems/subsys-testguide-test.md.

Signed-off-by: Nking_he <6384784@qq.com>

en/device-dev/subsystems/subsys-testguide-test.md

@@ -218,6 +218,7 @@ Example:
     	}
     	```
 	    The following test case templates are provided for your reference.
+
 	    | Type | Description |
 	    | ------------ | ------------ |
 	    | HWTEST(A,B,C) | Use this template if the test case execution does not depend on setup or teardown. |
@@ -234,8 +235,9 @@ Example:
 	    -  The test case level must be specified.
 	    -  It is recommended that the test be implemented step by step according to the template.
 	    -  The comment must contain the test case name, description, type, and requirement number, which are in the @tc.*xxx*: *value* format. The test case type @**tc.type** can be any of the following:
+
 	    | Test Case Type | Code |
-    	| ------------ | ------------ |
+	    | ------------ | ---------- |
 	    | Function test | FUNC |
 	    | Performance test | PERF |
  	    | Reliability test | RELI |