Revert fc usage in calculating suggestion

As far as I know, `fc` makes it impossible to tell whether history items
used an actual newline character or the string "\n". Pulling from the
`$history` array gives a more accurate representation of the actual
command that was run.

spec/strategies/default_spec.rb

@@ -30,7 +30,7 @@ describe 'default strategy' do
     end
   end
 
-  xcontext 'with a multiline hist entry' do
+  context 'with a multiline hist entry' do
     before do
       session.send_string('echo "')
       session.send_keys('enter')