Update doc

build/debian/README.howto

@@ -98,16 +98,19 @@ END
 
 * Staying into git root directory, run
 git-import-orig -vv ../tcpdf_6.0.020+dfsg.orig.tar.xz
-git-commit
+
+Note: If there was errors managed manually, you may need to make a git commit
 
 * Add an entry into debian/changelog
 date -R will return formated string date to use into changelog
 
+Warning: Entry added here is used by next step.
+
 * We try to build package
 git-buildpackage -us -uc
 
 * If package .deb is ok:
-git-commit 					(but do not use option "amend" previous commit)
+Note: If there was errors managed manually, you may need to make a git commit but do not use option "amend" previous commit
 git-buildpackage --git-tag
 git push
 git push --tags