change two spaces to a space

In line 5 and 6, Message have two spaces, so I change them to a space.

lib/plugins/usermanager/lang/en/import.txt

@@ -2,8 +2,8 @@
 
 Requires a CSV file of users with at least four columns.
 The columns must contain, in order: user-id, full name, email address and groups.
-The CSV fields should be separated by commas (,) and strings delimited by quotation marks (%%""%%).  Backslash (\) can be used for escaping.
-For an example of a suitable file, try the "Export Users" function above.  
+The CSV fields should be separated by commas (,) and strings delimited by quotation marks (%%""%%). Backslash (\) can be used for escaping.
+For an example of a suitable file, try the "Export Users" function above.
 Duplicate user-ids will be ignored.
 
 A password will be generated and emailed to each successfully imported user.