[Myfaces Wiki] Update of "Contributing Patches" by JeffBischoff

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The following page has been changed by JeffBischoff:
http://wiki.apache.org/myfaces/Contributing_Patches

The comment on the change is:
Added a pointer for grouping all changes into a single diff. Adjust as needed!

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  On unix, you can use "diff -u" to create raw patch files.
  Eclipse's SVN module and TortoiseSVN have "Create patch" menu options.
- In unix/windows you can also use the command "svn diff" to generate a diff with all your changes, including new files providing you have used the "svn add" command to mark them to be added in the svn repository beforehand.
+ In unix/windows you can also use the command "svn diff" to generate a diff with all your changes, including new files providing you have used the "svn add" command to mark them to be added in the svn repository beforehand. It is customary to include all changes into a single diff file, so for example if you are in the root folder of your local source tree you can do something like:
  
- After you have attached your files to the jira issue, mark the issue as "Patch Provided."
+ svn diff * > MyPatch.patch
+ 
+ After you have attached your files to the jira issue, mark the issue as "Patch Provided." Please provide a comment detailing what changes your fix will make.
  
  === Contributing a new component ===