Fix missing space in error_level example

Author: Adam-S-Daniel

docs/tools/sqlcmd-utility.md

@@ -416,7 +416,7 @@ Prints raw error messages to the screen.
  If the **sqlcmd** script contains an incorrect comment, syntax error, or is missing a scripting variable, ERRORLEVEL returned is 1.  
   
  **-m** *error_level*  
- Controls which error messages are sent to **stdout**. Messages that have a severity level greater than or equal to this level are sent. When this value is set to **-1**, all messages including informational messages, are sent. Spaces are not allowed between the **-m** and **-1**. For example, **-m-1** is valid, and **-m-1** is not.  
+ Controls which error messages are sent to **stdout**. Messages that have a severity level greater than or equal to this level are sent. When this value is set to **-1**, all messages including informational messages, are sent. Spaces are not allowed between the **-m** and **-1**. For example, **-m-1** is valid, and **-m -1** is not.  
   
  This option also sets the **sqlcmd** scripting variable SQLCMDERRORLEVEL. This variable has a default of 0.