config: make strings translatable

Turn several multiline strings into single-line strings for better
translatability.

config/config.go

@@ -17,6 +17,7 @@ import (
 	"github.com/git-lfs/git-lfs/v3/fs"
 	"github.com/git-lfs/git-lfs/v3/git"
 	"github.com/git-lfs/git-lfs/v3/tools"
+	"github.com/git-lfs/git-lfs/v3/tr"
 	"github.com/rubyist/tracerx"
 )
 
@@ -79,7 +80,7 @@ func NewIn(workdir, gitdir string) *Configuration {
 		callback: func() Environment {
 			sources, err := gitConf.Sources(c.LocalWorkingDir(), ".lfsconfig")
 			if err != nil {
-				fmt.Fprintf(os.Stderr, "Error reading git config: %s\n", err)
+				fmt.Fprintf(os.Stderr, tr.Tr.Get("Error reading git config: %s\n", err))
 			}
 			return c.readGitConfig(sources...)
 		},

config/extension.go

@@ -1,8 +1,10 @@
 package config
 
 import (
-	"fmt"
+	"errors"
 	"sort"
+
+	"github.com/git-lfs/git-lfs/v3/tr"
 )
 
 // An Extension describes how to manipulate files during smudge and clean.
@@ -21,7 +23,7 @@ func SortExtensions(m map[string]Extension) ([]Extension, error) {
 	for n, ext := range m {
 		p := ext.Priority
 		if _, exist := pMap[p]; exist {
-			err := fmt.Errorf("duplicate priority %d on %s", p, n)
+			err := errors.New(tr.Tr.Get("duplicate priority %d on %s", p, n))
 			return nil, err
 		}
 		pMap[p] = ext

config/git_fetcher.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 
 	"github.com/git-lfs/git-lfs/v3/git"
+	"github.com/git-lfs/git-lfs/v3/tr"
 )
 
 type GitFetcher struct {
@@ -39,7 +40,7 @@ func readGitConfig(configs ...*git.ConfigurationSource) (gf *GitFetcher, extensi
 
 			if origKey, ok := uniqKeys[key]; ok {
 				if ShowConfigWarnings && len(vals[key]) > 0 && vals[key][len(vals[key])-1] != val && strings.HasPrefix(key, gitConfigWarningPrefix) {
-					fmt.Fprintf(os.Stderr, "WARNING: These git config values clash:\n")
+					fmt.Fprint(os.Stderr, tr.Tr.Get("warning: These git config values clash:\n"))
 					fmt.Fprintf(os.Stderr, "  git config %q = %q\n", origKey, vals[key])
 					fmt.Fprintf(os.Stderr, "  git config %q = %q\n", pieces[0], val)
 				}
@@ -101,7 +102,7 @@ func readGitConfig(configs ...*git.ConfigurationSource) (gf *GitFetcher, extensi
 	}
 
 	if len(ignored) > 0 {
-		fmt.Fprintf(os.Stderr, "WARNING: These unsafe lfsconfig keys were ignored:\n\n")
+		fmt.Fprintf(os.Stderr, tr.Tr.Get("warning: These unsafe lfsconfig keys were ignored:\n\n"))
 		for _, key := range ignored {
 			fmt.Fprintf(os.Stderr, "  %s\n", key)
 		}

t/t-config.sh

@@ -252,7 +252,7 @@ begin_test "config: ignoring unsafe lfsconfig keys"
 
   git lfs env 2>&1 | tee status.log
 
-  grep "WARNING: These unsafe lfsconfig keys were ignored:" status.log
+  grep "warning: These unsafe lfsconfig keys were ignored:" status.log
   grep "  core.askpass" status.log
 )
 end_test