Quote correction

Author: HardNorth

reportportal_client/helpers.py

@@ -205,11 +205,11 @@ def get_function_params(func, args, kwargs):
 
 TYPICAL_MULTIPART_FOOTER_LENGTH = len(TYPICAL_MULTIPART_FOOTER)
 
-TYPICAL_JSON_ARRAY = "[]"
+TYPICAL_JSON_ARRAY = '[]'
 
 TYPICAL_JSON_ARRAY_LENGTH = len(TYPICAL_JSON_ARRAY)
 
-TYPICAL_JSON_ARRAY_ELEMENT = ","
+TYPICAL_JSON_ARRAY_ELEMENT = ','
 
 TYPICAL_JSON_ARRAY_ELEMENT_LENGTH = len(TYPICAL_JSON_ARRAY_ELEMENT)