About selecting text with slash

[Angelo Graziosi]

When one double clicks the underscore in this text

   $(B)/def_ghij

also the slash is selected... while if the text does not contain the underscore,

  $(B)/defghij

double clicking the word, does not select the slash...

Other cases would be

  $(B)/def_ghij/   # Both slashes selected
  $(B)/defghij/    # No slash selected


Is this intentional? Really, I do not see the need to have also the slash 
selected...