test: use 'stty size' for vtest --- line instead of 'tput cols'

tools/modules/testing/common.v

@@ -94,6 +94,7 @@ pub fn (ts mut TestSession) test() {
 		os.rm( tmpc_filepath )
 	}
 	ts.benchmark.stop()
+	eprintln(term.h_divider())
 }
 
 pub fn vlib_should_be_present( parent_dir string ) {
@@ -177,6 +178,7 @@ pub fn building_any_v_binaries_failed() bool {
 		eprintln(bmark.step_message('$cmd => ${bok}'))
 	}
 	bmark.stop()
+	eprintln(term.h_divider())  
 	eprintln( bmark.total_message( 'building v binaries' ) )
 
 	return failed

tools/vtest.v

@@ -47,15 +47,6 @@ pub fn main() {
 	println('Testing...')
 	ts.test()
 
-	// Print separator with dynamic width
-	mut cols := 76
-	if tput := os.exec("tput cols; echo") {
-		if tput.exit_code == 0 {
-			cols = tput.output.int()
-		}
-	}
-	println("-".repeat(cols))
-
 	println( ts.benchmark.total_message('running V _test.v files') )
 	if ts.failed {
 		exit(1)