Simplify branch / tag label placement

A single . is enough to put it on the same rank as the associated commit.

README.org

@@ -128,7 +128,7 @@
 #+begin_src plantuml
   !procedure $branchLabel($commit, $name)
   rectangle "$name" <<branchLabel>>
-  $commit .[norank]. [$name] #grey
+  $commit . [$name] #grey
   !endprocedure
 #+end_src
 
@@ -167,9 +167,7 @@ Assigns a tag label to a commit. The commit has to be added with a =$commit= or
   !procedure $tag($commit, $name)
   together {
           rectangle "$name" <<tag>>
-          $commit .[norank,hidden]. [$name] #grey
-          $commit .[norank]. [$name] #grey
-          $commit .[norank,hidden]. [$name] #grey
+          $commit . [$name] #grey
   }
   !endprocedure
 #+end_src

git.plantuml

@@ -46,14 +46,12 @@ $declareCommit($name, $label)
 
 !procedure $branchLabel($commit, $name)
 rectangle "$name" <<branchLabel>>
-$commit .[norank]. [$name] #grey
+$commit . [$name] #grey
 !endprocedure
 !procedure $tag($commit, $name)
 together {
         rectangle "$name" <<tag>>
-        $commit .[norank,hidden]. [$name] #grey
-        $commit .[norank]. [$name] #grey
-        $commit .[norank,hidden]. [$name] #grey
+        $commit . [$name] #grey
 }
 !endprocedure
 !procedure $branch_start($name, $numCommits, $fromBranch1="", $fromCommit1="", $toBranch="", $toCommit="", $fromBranch2="", $fromCommit2="")