perf: 优化代码和错误提示 (#101)

apps/common/util/file_util.py

@@ -9,8 +9,6 @@
 
 
 def get_file_content(path):
-    file = open(path, "r",
-                encoding='utf-8')
-    content = file.read()
-    file.close()
+    with open(path, "r", encoding='utf-8') as file:
+        content = file.read()
     return content

apps/smartdoc/conf.py

@@ -193,11 +193,11 @@ class ConfigManager:
         if manager.load_from_yml():
             config = manager.config
         else:
-            msg = """
+            msg = f"""
 
             Error: No config file found.
 
-            You can run `cp config_example.yml config_example.yml`, and edit it.
+            You can run `cp config_example.yml {root_path}/config_example.yml`, and edit it.
             """
             raise ImportError(msg)
         return config