docs: fix some comments

backend/drive/drive.go

@@ -2833,7 +2833,7 @@ func (f *Fs) Copy(ctx context.Context, src fs.Object, remote string) (fs.Object,
 	// FIXME remove this when google fixes the problem!
 	if isDoc {
 		// A short sleep is needed here in order to make the
-		// change effective, without it is is ignored. This is
+		// change effective, without it is ignored. This is
 		// probably some eventual consistency nastiness.
 		sleepTime := 2 * time.Second
 		fs.Debugf(f, "Sleeping for %v before setting the modtime to work around drive bug - see #4517", sleepTime)

backend/zoho/api/types.go

@@ -90,7 +90,7 @@ type UploadResponse struct {
 	Uploads []UploadInfo `json:"data"`
 }
 
-// WriteMetadataRequest is is used to write metadata for a
+// WriteMetadataRequest is used to write metadata for a
 // single item
 type WriteMetadataRequest struct {
 	Data WriteMetadata `json:"data"`

cmd/bisync/checkfn.go

@@ -64,7 +64,7 @@ func WhichCheck(ctx context.Context, opt *operations.CheckOpt) *operations.Check
 		}
 	}
 
-	// if we've gotten this far, niether check or cryptcheck will work, so use --download
+	// if we've gotten this far, neither check or cryptcheck will work, so use --download
 	fs.Infof(fdst, "Can't compare hashes, so using check --download for safety. (Use --size-only or --ignore-checksum to disable)")
 	opt.Check = DownloadCheckFn
 	return opt

cmd/bisync/resolve.go

@@ -274,7 +274,7 @@ func (ri *renamesInfo) getNames(is1to2 bool) (srcOldName, srcNewName, dstOldName
 	return ri.path2.oldName, ri.path2.newName, ri.path1.oldName, ri.path1.newName
 }
 
-// work out the lowest number that niether side has, return it for suffix
+// work out the lowest number that neither side has, return it for suffix
 func (b *bisyncRun) numerate(ctx context.Context, startnum int, file, alias string) int {
 	for i := startnum; i < math.MaxInt; i++ {
 		iStr := fmt.Sprint(i)