Fix invalid yaml formatting

Signed-off-by: Vadim Markovtsev <vadim@sourced.tech>

leaves/research/typos.go

@@ -19,6 +19,7 @@ import (
 	"gopkg.in/src-d/hercules.v10/internal/pb"
 	items "gopkg.in/src-d/hercules.v10/internal/plumbing"
 	uast_items "gopkg.in/src-d/hercules.v10/internal/plumbing/uast"
+	"gopkg.in/src-d/hercules.v10/internal/yaml"
 )
 
 // TyposDatasetBuilder collects pairs of typo-fix in source code identifiers.
@@ -272,10 +273,10 @@ func (tdb *TyposDatasetBuilder) Serialize(result interface{}, binary bool, write
 
 func (tdb *TyposDatasetBuilder) serializeText(result *TyposResult, writer io.Writer) {
 	for _, t := range result.Typos {
-		fmt.Fprintf(writer, "  - wrong: %s\n", t.Wrong)
-		fmt.Fprintf(writer, "    correct: %s\n", t.Correct)
+		fmt.Fprintf(writer, "  - wrong: %s\n", yaml.SafeString(t.Wrong))
+		fmt.Fprintf(writer, "    correct: %s\n", yaml.SafeString(t.Correct))
 		fmt.Fprintf(writer, "    commit: %s\n", t.Commit.String())
-		fmt.Fprintf(writer, "    file: %s\n", t.File)
+		fmt.Fprintf(writer, "    file: %s\n", yaml.SafeString(t.File))
 		fmt.Fprintf(writer, "    line: %d\n", t.Line)
 	}
 }

leaves/research/typos_test.go

@@ -237,10 +237,10 @@ func TestTyposDatasetSerialize(t *testing.T) {
 	buffer := &bytes.Buffer{}
 	err := ca.Serialize(res, false, buffer)
 	assert.Nil(t, err)
-	assert.Equal(t, `  - wrong: Fo
-    correct: Foo
+	assert.Equal(t, `  - wrong: "Fo"
+    correct: "Foo"
     commit: 0000000000000000000000000000000000000000
-    file: bar.go
+    file: "bar.go"
     line: 7
 `, buffer.String())