stream-clone-test: add title to various test cases

These case are fine as is, but as we are adding title to all the other as we
simplify them, lets add title for all cases.

tests/test-clone-stream.t

@@ -315,6 +315,10 b' Secret changeset can still be streamed i'
   $ killdaemons.py
 
 Verify interaction between preferuncompressed and secret presence
+-----------------------------------------------------------------
+
+Secret presence will still make the clone falls back to a normal bundle even if
+the server prefers stream clone.
 
   $ cd server
   $ hg serve --config server.preferuncompressed=true -p $HGPORT -d --pid-file=hg.pid
@@ -332,6 +336,9 b' Verify interaction between preferuncompr'
   $ killdaemons.py
 
 Clone not allowed when full bundles disabled and can't serve secrets
+--------------------------------------------------------------------
+
+The clone should fail as no valid option is found.
 
   $ cd server
   $ hg serve --config server.disablefullbundle=true -p $HGPORT -d --pid-file=hg.pid
@@ -347,6 +354,8 b' Clone not allowed when full bundles disa'
   [100]
 
 Local stream clone with secrets involved
+----------------------------------------
+
 (This is just a test over behavior: if you have access to the repo's files,
 there is no security so it isn't important to prevent a clone here.)
 
@@ -673,12 +682,14 b' Clone non-publishing with obsolescence'
 #endif
 
 Cloning a repo with no requirements doesn't give some obscure error
+-------------------------------------------------------------------
 
   $ mkdir -p empty-repo/.hg
   $ hg clone -q --stream ssh://user@dummy/empty-repo empty-repo2
   $ hg --cwd empty-repo2 verify -q
 
 Cloning a repo with an empty manifestlog doesn't give some weird error
+----------------------------------------------------------------------
 
   $ rm -r empty-repo; hg init empty-repo
   $ (cd empty-repo; touch x; hg commit -Am empty; hg debugstrip -r 0) > /dev/null