patch 8.2.5127: using assert_true() does not show value on failure

Problem:    Using assert_true() does not show value on failure.
Solution:   Use assert_inrange(). (closes #10593)

src/testdir/test_channel.vim

@@ -528,7 +528,7 @@ func Test_connect_waittime()
     call ch_close(handle)
   else
     let elapsed = reltime(start)
-    call assert_true(reltimefloat(elapsed) < 1.0)
+    call assert_inrange(0.0, 1.0, reltimefloat(elapsed))
   endif
 
   " We intend to use a socket that doesn't exist and wait for half a second
@@ -1634,8 +1634,7 @@ func Test_exit_callback_interval()
   let g:exit_cb_val.process = job_info(job).process
   call WaitFor('type(g:exit_cb_val.end) != v:t_number || g:exit_cb_val.end != 0')
   let elapsed = reltimefloat(g:exit_cb_val.end)
-  call assert_true(elapsed > 0.5)
-  call assert_true(elapsed < 1.0)
+  call assert_inrange(0.5, 1.0, elapsed)
 
   " case: unreferenced job, using timer
   if !has('timers')

src/testdir/test_hlsearch.vim

@@ -54,8 +54,7 @@ func Test_hlsearch_hangs()
   let @/ = '\%#=1a*.*X\@<=b*'
   redraw
   let elapsed = reltimefloat(reltime(start))
-  call assert_true(elapsed > min_timeout)
-  call assert_true(elapsed < 1.0)
+  call assert_inrange(min_timeout, 1.0, elapsed)
   set nohlsearch redrawtime&
   bwipe!
 endfunc

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5127,
 /**/
     5126,
 /**/