change: add --tb=short for hrun command

docs/CHANGELOG.md

@@ -11,6 +11,7 @@
 - change: add `export` keyword in TStep to export session variables from referenced testcase
 - change: rename TestCaseInOut field, config_vars and export_vars
 - change: rename StepData field, export_vars
+- change: add `--tb=short` for `hrun` command to use shorter traceback format by default
 
 ## 3.0.8 (2020-06-04)
 

httprunner/cli.py

@@ -48,6 +48,9 @@ def main_run(extra_args):
         logger.error("No valid testcases found, exit 1.")
         sys.exit(1)
 
+    if "--tb=short" not in extra_args_new:
+        extra_args_new.append("--tb=short")
+
     extra_args_new.extend(testcase_path_list)
     sys.exit(pytest.main(extra_args_new))