Update s3cmd.md

docs.it4i/storage/s3cmd.md

 # s3cmd
 
 S3cmd is a command-line tool for managing data in Amazon Simple Storage Service (S3). It is a free and open-source tool that is available for Linux, macOS, and Windows.
- 
-For more information, see [https://docs.e-infra.cz/storage/object-storage/s3cmd/][a] 
+
+For more information, see [https://docs.e-infra.cz/storage/object-storage/s3cmd/][a].
 
 We recommend using the S3cmd tool already installed on Karolina.
 
-## How to Load Modules: 
+## How to Load Modules:
 
 To see loaded modules, use:
 
@@ -24,19 +24,19 @@ To see module info, use:
 
 ```
 ml spider s3cmd
-``` 
+```
 
-For more information on how to work with modules, see 
+For more information on how to work with modules, see
 [https://docs.it4i.cz/software/modules/lmod/][1].
 
 ## Configuration
 
 The s3cmd configuration file is named `.s3cfg` and it is located in the user's home directory, e.g. `/home/username/($HOME)`.
- 
+
 The configuration file has to be created first:
 
 ```
-s3cmd --configure 
+s3cmd --configure
 ```
 
 For configuration steps, follow the [e-INFRA CZ guide][b].
@@ -50,6 +50,7 @@ Error when creating bucket:
 ```
 ERROR: S3 error: 400 (InvalidLocationConstraint): The specified location-constraint is not valid
 ```
+
 Solution: set location:
 
 ```