Content assist activation char is duplicated

[basti1302]

Some text fields in preference pages have content assist for variables. If content assist is triggered by an auto activation character, the activation character is not deleted when the user choses one of the proposals. This leads to a duplicated $ or { character in the command definition. (custom commands and custom desktop environment section)

[anb0s]

I've faced the same issue with content assist in EasyShell 2.x stream, see "anb0s/EasyShell#91" and fixed it like this:

• instead of TextContentAdapter() one have to implement own one with overriden "getSelection()" method, that just selects the activation sequences ($, { or ${) and then they are replaced with user selected content, see anb0s/EasyShell@d6f4ea3

:)