revert white-space changes in docs (#12557)

### What problem does this PR solve?

Trailing white-spaces in commit 6814ace1aa
got automatically trimmed by code editor may causes documentation
typesetting broken.

Mostly for double spaces for soft line breaks.  

### Type of change

- [x] Documentation Update

docs/guides/admin/admin_cli.md

@@ -5,7 +5,6 @@ sidebar_custom_props: {
   categoryIcon: LucideSquareTerminal
 }
 ---
-
 # Admin CLI
 
 The RAGFlow Admin CLI is a command-line-based system administration tool that offers administrators an efficient and flexible method for system interaction and control. Operating on a client-server architecture, it communicates in real-time with the Admin Service, receiving administrator commands and dynamically returning execution results.
@@ -30,9 +29,9 @@ The RAGFlow Admin CLI is a command-line-based system administration tool that of
     The default password is admin.
 
     **Parameters:**
-
+    
     - -h: RAGFlow admin server host address
-
+    
     - -p: RAGFlow admin server port
 
 ## Default administrative account

docs/guides/admin/admin_service.md

@@ -5,8 +5,6 @@ sidebar_custom_props: {
   categoryIcon: LucideActivity
 }
 ---
-
-
 # Admin Service
 
 The Admin Service is the core backend management service of the RAGFlow system, providing comprehensive system administration capabilities through centralized API interfaces for managing and controlling the entire platform. Adopting a client-server architecture, it supports access and operations via both a Web UI and an Admin CLI, ensuring flexible and efficient execution of administrative tasks.
@@ -27,7 +25,7 @@ With its unified interface design, the Admin Service combines the convenience of
    python admin/server/admin_server.py
    ```
 
-   The service will start and listen for incoming connections from the CLI on the configured port.
+   The service will start and listen for incoming connections from the CLI on the configured port. 
 
 ### Using docker image
 

docs/guides/admin/admin_ui.md

@@ -5,7 +5,6 @@ sidebar_custom_props: {
   categoryIcon: LucidePalette
 }
 ---
-
 # Admin UI
 
 The RAGFlow Admin UI is a web-based interface that provides comprehensive system status monitoring and user management capabilities.