Capitalize first letters of file result messages

file_result.go

@@ -17,7 +17,7 @@ func (r fileResult) String(verbose bool) string {
 	ss := make([]string, 0, len(r.urlResults))
 
 	if r.err != nil {
-		ss = append(ss, indent(color.RedString(r.err.Error())))
+		ss = append(ss, indent(color.RedString(capitalizeFirst(r.err.Error()))))
 	}
 
 	os := make([]string, 0, len(r.urlResults))

main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"fmt"
 	"os"
-	"strings"
 	"sync"
 
 	"github.com/fatih/color"
@@ -59,7 +58,6 @@ func printToStderr(xs ...interface{}) {
 }
 
 func fail(err error) {
-	s := err.Error()
+	printToStderr(color.RedString(capitalizeFirst(err.Error())))
-	printToStderr(color.RedString(strings.ToUpper(s[:1]) + s[1:]))
 	os.Exit(1)
 }

utils.go

@@ -1,6 +1,10 @@
 package main
 
-import "github.com/kr/text"
+import (
+	"strings"
+
+	"github.com/kr/text"
+)
 
 func stringSetToSlice(s2b map[string]bool) []string {
 	ss := make([]string, 0, len(s2b))
@@ -15,3 +19,7 @@ func stringSetToSlice(s2b map[string]bool) []string {
 func indent(s string) string {
 	return text.Indent(s, "\t")
 }
+
+func capitalizeFirst(s string) string {
+	return strings.ToUpper(s[:1]) + s[1:]
+}

utils_test.go

@@ -25,3 +25,12 @@ func TestIndent(t *testing.T) {
 		assert.Equal(t, c.target, indent(c.source))
 	}
 }
+
+func TestCapitalizeFirst(t *testing.T) {
+	for _, ss := range [][2]string{
+		{"foo", "Foo"},
+		{"foo bar", "Foo bar"},
+	} {
+		assert.Equal(t, ss[1], capitalizeFirst(ss[0]))
+	}
+}