documentation: add tutorial for first contribution

diff --git a/Documentation/RelNotes/2.20.0.txt b/Documentation/RelNotes/2.20.0.txt
index 201135d80c11ca76be8fc54c333cf4b4fd01b849..e71fe3dee13ea181f22bd38e3418b8a08cdd0b27 100644 (file)
--- a/Documentation/RelNotes/2.20.0.txt
+++ b/Documentation/RelNotes/2.20.0.txt
@@ -578,7 +578,7 @@ Fixes since v2.19
 
  * "git rev-parse --exclude=* --branches --branches"  (i.e. first
    saying "add only things that do not match '*' out of all branches"
-   and then adding all branches, without any exclusion this time")
+   and then adding all branches, without any exclusion this time)
    worked as expected, but "--exclude=* --all --all" did not work the
    same way, which has been fixed.
    (merge 5221048092 ag/rev-parse-all-exclude-fix later to maint).