Merge pull request #867 from rpjday/branch_merged

Mention to readers that '--merged' and --no-merged' take commit argum…

Author: ben

book/03-git-branching/sections/branch-management.asc

@@ -59,3 +59,17 @@ If you are sure you want to delete it, run 'git branch -D testing'.
 ----
 
 If you really do want to delete the branch and lose that work, you can force it with `-D`, as the helpful message points out.
+
+[TIP]
+====
+The options described above, `--merged` and `--no-merged` will, if not given a commit or branch name as an argument, show you what is, respectively, merged or not merged into your _current_ branch.
+
+You can always provide an additional argument to ask about the merge state with respect to some other branch without checking  that other branch out first, as in, what is not merged into the `master` branch?
+[source,console]
+----
+$ git checkout testing
+$ git branch --no-merged master
+  topicA
+  featureB
+----
+====