Update docs/content/doc/developers/guidelines-backend.md

Author: wxiaoguang

docs/content/doc/developers/guidelines-backend.md

@@ -103,7 +103,7 @@ i.e. `servcies/user`, `models/repository`.
 
 ### Import Alias
 
-Since there are many packages and sub-packages, it is possible that you find packages like `modules/user`, `models/user`, and `services/user`. When these packages are imported in one Go file, it's difficult to know which package we are using and if it's a variable name or an import name. So, we always recommend to use import aliases. To differ from package variables which are commonly in camelCase, just use **snake_case** for import aliases.
+Since there are some packages which use the same package name, it is possible that you find packages like `modules/user`, `models/user`, and `services/user`. When these packages are imported in one Go file, it's difficult to know which package we are using and if it's a variable name or an import name. So, we always recommend to use import aliases. To differ from package variables which are commonly in camelCase, just use **snake_case** for import aliases.
 i.e. `import user_service "code.gitea.io/gitea/services/user"`
 
 ### Future Tasks