[#322] *: Go fmt -s

go1.19 rewrites comments to proper render them in docs.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>

storagegroup/doc.go

@@ -3,6 +3,7 @@ Package storagegroup provides features to work with information that is
 used for proof of storage in NeoFS system.
 
 StorageGroup type groups verification values for Data Audit sessions:
+
 	// receive sg info
 
 	sg.ExpirationEpoch() // expiration of the storage group
@@ -14,6 +15,7 @@ Instances can be also used to process NeoFS API V2 protocol messages
 (see neo.fs.v2.storagegroup package in https://github.com/nspcc-dev/neofs-api).
 
 On client side:
+
 	import "github.com/nspcc-dev/neofs-api-go/v2/storagegroup"
 
 	var msg storagegroup.StorageGroup
@@ -22,6 +24,7 @@ On client side:
 	// send msg
 
 On server side:
+
 	// recv msg
 
 	var sg StorageGroupDecimal
@@ -31,6 +34,5 @@ On server side:
 
 Using package types in an application is recommended to potentially work with
 different protocol versions with which these types are compatible.
-
 */
 package storagegroup