Update docs

docs/source/formatting_your_dataset.md

@@ -19,15 +19,15 @@ Let's assume you created the audio clips and their transcription. You can collec
 
 You can either create separate transcription files for each clip or create a text file that maps each audio clip to its transcription. In this file, each line must be delimitered by a special character separating the audio file name from the transcription. And make sure that the delimiter is not used in the transcription text.
 
-We recommend the following format delimited by `||`. In the following example, `audio1`, `audio2` refer to files `audio1.wav`, `audio2.wav` etc.
+We recommend the following format delimited by `|`. In the following example, `audio1`, `audio2` refer to files `audio1.wav`, `audio2.wav` etc.
 
 ```
 # metadata.txt
 
-audio1||This is my sentence.
-audio2||This is maybe my sentence.
-audio3||This is certainly my sentence.
-audio4||Let this be your sentence.
+audio1|This is my sentence.
+audio2|This is maybe my sentence.
+audio3|This is certainly my sentence.
+audio4|Let this be your sentence.
 ...
 ```