Add profiling merge example without arguments

content/docs/tooling/tooling-performance-analysis.md

@@ -222,25 +222,45 @@ where the naming pattern is `participant-rank-file_number`. To find and merge th
 $ ls
 A
 B
-$ precice-cli profiling merge A B
-Searching A : found 1 files in A/precice-profiling
-Searching B : found 1 files in B/precice-profiling
-Found 2 unique event files
+$ precice-cli profiling merge
+Found 2 files in .
 Found a single run for participant B
 Found a single run for participant A
-Loading event files
-Globalizing event names
-Grouping events
-Aligning B (-179us) with A
-Writing to profiling.db
+Loading 2 event files
+Loading precice-profiling/B-0-1.txt
+Processing precice-profiling/B-0-1.txt
+Loading precice-profiling/A-0-1.txt
+Processing precice-profiling/A-0-1.txt
+Align participant ranks
+Align participants
+Aligning B with A shift latter by 5
 $ ls
 A
 B
 profiling.db
 ```
 
-The merge command searches passed directories for the event files.
+The merge command searches the current directory recursively for event files.
+You can also pass individual directories to be searched, or individual event files to use.
 You can also pass individual files if you are not interested in all ranks.
+To tell the merge to search only folders A and B run:
+
+```console
+precice-cli profiling merge A B 
+Found 1 files in A
+Found 1 files in B
+Found 2 profiling files in total
+Found a single run for participant A
+Found a single run for participant B
+Loading 2 event files
+Loading A/precice-profiling/A-0-1.txt
+Processing A/precice-profiling/A-0-1.txt
+Loading B/precice-profiling/B-0-1.txt
+Processing B/precice-profiling/B-0-1.txt
+Align participant ranks
+Align participants
+Aligning B with A shift latter by 5
+```
 
 The merge command is written in pure Python, without external dependencies, to make it easy to use on clusters.
 After you run `precice-cli profiling merge`, you end up with a single file, which can be additionally compressed and transferred to another machine.