test(old): change usage of Q to gQ

test(old) fix Test_ex_mode_count_overflow

test(old) change usage of Q to gQ

src/nvim/testdir/test_ex_mode.vim

@@ -85,7 +85,7 @@ endfunc
 func Test_ex_mode_count_overflow()
   " this used to cause a crash
   let lines =<< trim END
-    call feedkeys("\<Esc>Q\<CR>")
+    call feedkeys("\<Esc>gQ\<CR>")
     v9|9silent! vi|333333233333y32333333%O
     call writefile(['done'], 'Xdidexmode')
     qall!

src/nvim/testdir/test_substitute.vim

@@ -137,7 +137,7 @@ func Test_substitute_repeat()
   " This caused an invalid memory access.
   split Xfile
   s/^/x
-  call feedkeys("Qsc\<CR>y", 'tx')
+  call feedkeys("gQsc\<CR>y", 'tx')
   bwipe!
 endfunc
 

src/nvim/testdir/test_timers.vim

@@ -279,7 +279,7 @@ func Test_ex_mode()
   endfunc
   let timer = timer_start(40, function('g:Foo'), {'repeat':-1})
   " This used to throw error E749.
-  exe "normal Qsleep 100m\rvi\r"
+  exe "normal gQsleep 100m\rvi\r"
   call timer_stop(timer)
 endfunc