patch 8.1.1624: when testing in the GUI may try to run gvim in a terminal

Problem:    When testing in the GUI may try to run gvim in a terminal.
Solution:   Add the -v argument. (Yee Cheng Chin, closes #4605)  Don't skip
            tests that work now.
diff --git a/src/testdir/shared.vim b/src/testdir/shared.vim
index 53b7314..e1bb818 100644
--- a/src/testdir/shared.vim
+++ b/src/testdir/shared.vim
@@ -284,6 +284,13 @@
   return cmd
 endfunc
 
+" Get the command to run Vim, with --clean, and force to run in terminal so it
+" won't start a new GUI.
+func GetVimCommandCleanTerm()
+  " Add -v to have gvim run in the terminal (if possible)
+  return GetVimCommandClean() .. ' -v '
+endfunc
+
 " Run Vim, using the "vimcmd" file and "-u NORC".
 " "before" is a list of Vim commands to be executed before loading plugins.
 " "after" is a list of Vim commands to be executed after loading plugins.
diff --git a/src/testdir/term_util.vim b/src/testdir/term_util.vim
index 9bf38b3..1cfac0e 100644
--- a/src/testdir/term_util.vim
+++ b/src/testdir/term_util.vim
@@ -59,10 +59,8 @@
   let cols = get(a:options, 'cols', 75)
   let statusoff = get(a:options, 'statusoff', 1)
 
-  let cmd = GetVimCommandClean()
+  let cmd = GetVimCommandCleanTerm() .. a:arguments
 
-  " Add -v to have gvim run in the terminal (if possible)
-  let cmd .= ' -v ' . a:arguments
   let buf = term_start(cmd, {
 	\ 'curwin': 1,
 	\ 'term_rows': rows,
diff --git a/src/testdir/test_mapping.vim b/src/testdir/test_mapping.vim
index 184e1a4..2c6aa24 100644
--- a/src/testdir/test_mapping.vim
+++ b/src/testdir/test_mapping.vim
@@ -399,7 +399,7 @@
 endfunc
 
 func Test_error_in_map_expr()
-  if !has('terminal') || has('gui_running')
+  if !has('terminal') || (has('win32') && has('gui_running'))
     throw 'Skipped: cannot run Vim in a terminal window'
   endif
 
@@ -413,7 +413,7 @@
   [CODE]
   call writefile(lines, 'Xtest.vim')
 
-  let buf = term_start(GetVimCommandClean() .. ' -S Xtest.vim', {'term_rows': 8})
+  let buf = term_start(GetVimCommandCleanTerm() .. ' -S Xtest.vim', {'term_rows': 8})
   let job = term_getjob(buf)
   call WaitForAssert({-> assert_notequal('', term_getline(buf, 8))})
 
diff --git a/src/testdir/test_timers.vim b/src/testdir/test_timers.vim
index ee86e2a..42fe415 100644
--- a/src/testdir/test_timers.vim
+++ b/src/testdir/test_timers.vim
@@ -334,7 +334,7 @@
 endfunc
 
 func Test_error_in_timer_callback()
-  if !has('terminal') || has('gui_running')
+  if !has('terminal') || (has('win32') && has('gui_running'))
     throw 'Skipped: cannot run Vim in a terminal window'
   endif
 
@@ -348,7 +348,7 @@
   [CODE]
   call writefile(lines, 'Xtest.vim')
 
-  let buf = term_start(GetVimCommandClean() .. ' -S Xtest.vim', {'term_rows': 8})
+  let buf = term_start(GetVimCommandCleanTerm() .. ' -S Xtest.vim', {'term_rows': 8})
   let job = term_getjob(buf)
   call WaitForAssert({-> assert_notequal('', term_getline(buf, 8))})
 
diff --git a/src/version.c b/src/version.c
index 8e2399f..50c333c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1624,
+/**/
     1623,
 /**/
     1622,