revert 'fix kyaml issue with multiline scalars'

kyaml/internal/forked/github.com/go-yaml/yaml/decode_test.go

@@ -46,9 +46,6 @@ var unmarshalTests = []struct {
 		map[string]string{"v": "hi"},
 	}, {
 		"v: hi", map[string]interface{}{"v": "hi"},
-	}, {
-		"v: 'hi\nthis is a\nmultiline string\n'",
-		map[string]interface {}{"v":"hi\nthis is a\nmultiline string\n"},
 	}, {
 		"v: true",
 		map[string]string{"v": "true"},

kyaml/internal/forked/github.com/go-yaml/yaml/emitterc.go

@@ -1699,8 +1699,8 @@ func yaml_emitter_write_single_quoted_scalar(emitter *yaml_emitter_t, value []by
 				if !put_break(emitter) {
 					return false
 				}
-				i++
-			} else if !write_break(emitter, value, &i) {
+			}
+			if !write_break(emitter, value, &i) {
 				return false
 			}
 			//emitter.indention = true

kyaml/internal/forked/github.com/go-yaml/yaml/scannerc.go

@@ -2653,7 +2653,7 @@ func yaml_parser_scan_flow_scalar(parser *yaml_parser_t, token *yaml_token_t, si
 			// Do we need to fold line breaks?
 			if len(leading_break) > 0 && leading_break[0] == '\n' {
 				if len(trailing_breaks) == 0 {
-					s = append(s, '\n')
+					s = append(s, ' ')
 				} else {
 					s = append(s, trailing_breaks...)
 				}