Sh fully echoes commands which error exit

lib/rake/file_utils.rb

@@ -62,8 +62,6 @@ def sh(*cmd, &block)
 
   def create_shell_runner(cmd) # :nodoc:
     show_command = sh_show_command cmd
-    show_command = show_command[0, 42] + "..." unless $trace
-
     lambda do |ok, status|
       ok or
         fail "Command failed with status (#{status.exitstatus}): " +

test/test_rake_file_utils.rb

@@ -287,6 +287,49 @@ def test_sh_show_command
     assert_equal expected_cmd, show_cmd
   end
 
+  def test_sh_if_a_command_exits_with_error_status_its_full_output_is_printed
+    verbose false do
+      standard_output = 'Some output'
+      standard_error  = 'Some error'
+      shell_command = "ruby -e\"puts '#{standard_output}';STDERR.puts '#{standard_error}';exit false\""
+      actual_both = capture_subprocess_io do
+        begin
+          sh shell_command
+        rescue
+        else
+          flunk
+        end
+      end
+      actual = actual_both.join
+      assert_match standard_output, actual
+      assert_match standard_error,  actual
+    end
+  end
+
+  def test_sh_if_a_command_exits_with_error_status_sh_echoes_it_fully
+    verbose true do
+      assert_echoes_fully
+    end
+    verbose false do
+      assert_echoes_fully
+    end
+  end
+
+  def assert_echoes_fully
+    long_string = '1234567890' * 10
+    shell_command = "ruby -e\"'#{long_string}';exit false\""
+    capture_subprocess_io do
+      begin
+        sh shell_command
+      rescue => ex
+        assert_match 'Command failed with status', ex.message
+        assert_match shell_command, ex.message
+      else
+        flunk
+      end
+    end
+  end
+
   def test_ruby_with_multiple_arguments
     skip if jruby9? # https://github.com/jruby/jruby/issues/3653