problem with github

[Walter Bright]

Can anyone explain what I am doing wrong? It says my master is the same as the 
remote master, but I cannot push anything. Googling the error message suggests I 
do a `git pull origin master` which replies with `Your branch is up-to-date with 
'origin master'.

```
mercury~/forks/dmd defaultInitialize2> git checkout master
Switched to branch 'master'
Your branch is up-to-date with 'origin/master'.
mercury~/forks/dmd master> git pull origin master
 From github.com:WalterBright/dmd
  * branch            master     -> FETCH_HEAD
Already up-to-date.
mercury~/forks/dmd master> git checkout test
Switched to branch 'test'
mercury~/forks/dmd test> git rebase master
Current branch test is up to date.
mercury~/forks/dmd test> git diff master
diff --git a/compiler/src/dmd/parse.d b/compiler/src/dmd/parse.d
index 6b1ca8e..20f792c 100644
--- a/compiler/src/dmd/parse.d
+++ b/compiler/src/dmd/parse.d
@@ -1,4 +1,4 @@
-/**
+ /**
   * Takes a token stream from the lexer, and parses it into an abstract syntax 
tree.
   *
   * Specification: $(LINK2 https://dlang.org/spec/grammar.html, D Grammar)
mercury~/forks/dmd test> git push origin test
To git at github.com:WalterBright/dmd.git
  ! [rejected]        test -> test (non-fast-forward)
error: failed to push some refs to 'git at github.com:WalterBright/dmd.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
mercury~/forks/dmd test>
```