It is a set of minor assistance that Eclipse provides. But over all, makes a
huge difference in longer run. What does this mode do? Auto insert matching
copy-pasting code — take care of correct indentation in destination.
To enabled/disable this mode:
Ctrl + Shift + Insert OR
To customize the preferences:
" (quote), the 2nd
" (quote)is automatically inserted.
The interesting part is, if you manually press the second closing quote/bracket, it is overwritten.