Tab completion changes after Ctrl+C

[smcintyre-r7]

After Ctrl+C has been issued to msfconsole, the tab completion options start to append a space at the end of words which makes it very difficult to continue tab competing the rest of the path.

Steps to reproduce

1. Start msfconsole
2. Type use exp and hit tab, see it expand to use exploit/ (no trailing space, ready to complete more)
3. Hit Ctrl+C
4. Type use exp and hit tab, see it expand to use exploit/ (trailing space, completion terminated)

[sjanusz-r7]

For context, the cause of this issue is:

metasploit-framework/lib/rex/ui/text/dispatcher_shell.rb

Line 418 in b2e4ec9

::Reline.completion_append_character = ' '

It seems that Reline and Readline in this scenario do behave differently. Readline did set this append char before, but there must have been under-the-hood logic to not insert it in this scenario.
This issue appears after performing a single tab-completion, and Ctrl+C is not necessary to replicate it.
Will have a fix ready shortly 👍