patch 8.1.1193: typos and small problems in test files

Problem:    Typos and small problems in test files.
Solution:   Small improvements.

src/testdir/test_gn.vim

@@ -2,7 +2,7 @@
 
 func Test_gn_command()
   noautocmd new
-  " replace a single char by itsself quoted:
+  " replace a single char by itself quoted:
   call setline('.', 'abc x def x ghi x jkl')
   let @/ = 'x'
   exe "norm! cgn'x'\<esc>.."

src/testdir/test_quotestar.vim

@@ -97,7 +97,7 @@ func Do_test_quotestar_for_x11()
   if has('unix') && has('gui') && !has('gui_running')
     let @* = ''
 
-    " Running in a terminal and the GUI is avaiable: Tell the server to open
+    " Running in a terminal and the GUI is available: Tell the server to open
     " the GUI and check that the remote command still works.
     " Need to wait for the GUI to start up, otherwise the send hangs in trying
     " to send to the terminal window.

src/testdir/test_registers.vim

@@ -163,5 +163,7 @@ func Test_recording_esc_sequence()
   bwipe!
   if exists('save_F2')
     let t_F2 = save_F2
+  else
+    set t_F2=
   endif
 endfunc

src/testdir/test_tabpage.vim

@@ -140,9 +140,6 @@ endfunc
 
 " Test autocommands
 function Test_tabpage_with_autocmd()
-  if !has('autocmd')
-    return
-  endif
   command -nargs=1 -bar C :call add(s:li, '=== ' . <q-args> . ' ===')|<args>
   augroup TestTabpageGroup
     au!

src/testdir/test_vartabs.vim

@@ -5,6 +5,7 @@ if !has("vartabs")
 endif
 
 source view_util.vim
+
 func s:compare_lines(expect, actual)
   call assert_equal(join(a:expect, "\n"), join(a:actual, "\n"))
 endfunc
@@ -372,3 +373,9 @@ func Test_vartabs_failures()
   call assert_fails('set vts=,8')
   call assert_fails('set vsts=,8')
 endfunc
+
+func Test_vartabs_reset()
+  set vts=8
+  set all&
+  call assert_equal('', &vts)
+endfunc

src/version.c

@@ -771,6 +771,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1193,
 /**/
     1192,
 /**/