Indication about the eclipse code formatter

Author: EtienneSF

README.md

@@ -193,6 +193,7 @@ This project is a maven plugin project.
 
 If you want to compile it, you'll have to add the lombok.jar file in your IDE. Please see the relevant section, in the Install menu of the [https://projectlombok.org/](https://projectlombok.org/) home page. This very nice tools generates all java boiler plate code, like setters, getters, constructors from fields...
 
+If you use eclipse, please use the __code formatter__ given with the project (file _graphql-java-generator (eclipse code formatter).xml_ at the root of the project). This allows to have the sample code formatting: the code is then homogeneous, and the comparison between versions is simpler. To do this, go to the eclipse preferences, select Java/Code Style/Formatter, and import this file. Then, in the Java/Editor/Save Actions, check the "Perform the selected action on save", "Format source code", "Format all lines", "Organize imports" and "Additional actions" which its default content
 
 
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