更新依赖安装逻辑

backend/vendor/github.com/smartystreets/assertions/equality_diff.go

@@ -1,37 +0,0 @@
-package assertions
-
-import (
-	"fmt"
-
-	"github.com/smartystreets/assertions/internal/go-diff/diffmatchpatch"
-)
-
-func composePrettyDiff(expected, actual string) string {
-	diff := diffmatchpatch.New()
-	diffs := diff.DiffMain(expected, actual, false)
-	if prettyDiffIsLikelyToBeHelpful(diffs) {
-		return fmt.Sprintf("\nDiff:     '%s'", diff.DiffPrettyText(diffs))
-	}
-	return ""
-}
-
-// prettyDiffIsLikelyToBeHelpful returns true if the diff listing contains
-// more 'equal' segments than 'deleted'/'inserted' segments.
-func prettyDiffIsLikelyToBeHelpful(diffs []diffmatchpatch.Diff) bool {
-	equal, deleted, inserted := measureDiffTypeLengths(diffs)
-	return equal > deleted && equal > inserted
-}
-
-func measureDiffTypeLengths(diffs []diffmatchpatch.Diff) (equal, deleted, inserted int) {
-	for _, segment := range diffs {
-		switch segment.Type {
-		case diffmatchpatch.DiffEqual:
-			equal += len(segment.Text)
-		case diffmatchpatch.DiffDelete:
-			deleted += len(segment.Text)
-		case diffmatchpatch.DiffInsert:
-			inserted += len(segment.Text)
-		}
-	}
-	return equal, deleted, inserted
-}