Single word subtitle not handled properly

[Erk]

I'm trying to use perroquet for educational purpose.
French kids in elementary schools must learn a list of "well-known" words.
Those are called MI = Mots Invariables:
see for example:
http://www.ec-epiais-rhus.ac-versailles.fr/cycle3/documents/Mots%20invariablesCM2.pdf

I did record my son telling part of those words and then encoded the result as an ogg pure audio file.
Then I did create an .srt file corresponding to the audio file.

I my test case I do not need translation because there is none :-)
Basically I have an audio ogg + an .srt file containing only a single word per timestamped line of srt.

It works well indeed but I do have to add some extra "white space" before and/or after
the single word in order to make perroquet display the appropriate prompt.

[Fred Bertolus (fred-bertolus)]

Fix commited in developpement branch rev 114