Update storage-use-azcopy-blobs-synchronize.md

fix two instances of "a a" per Acrolionx

Author: jborsecnik

articles/storage/common/storage-use-azcopy-blobs-synchronize.md

@@ -72,7 +72,7 @@ azcopy sync 'https://mystorageaccount.blob.core.windows.net/mycontainer' 'C:\myD
 
 ## Update a container with changes in another container
 
-The first container that appears in this command is the source. The second one is the destination. Make sure to append a a SAS token to each source URL.
+The first container that appears in this command is the source. The second one is the destination. Make sure to append a SAS token to each source URL.
 
 If you provide authorization credentials by using Azure Active Directory (Azure AD), you can omit the SAS token only from the destination URL. Make sure that you've set up the proper roles in your destination account. See [Option 1: Use Azure Active Directory](storage-use-azcopy-v10.md?toc=/azure/storage/blobs/toc.json#option-1-use-azure-active-directory).
 
@@ -91,7 +91,7 @@ azcopy sync 'https://mysourceaccount.blob.core.windows.net/mycontainer?sv=2018-0
 
 ## Update a directory with changes to a directory in another container
 
-The first directory that appears in this command is the source. The second one is the destination. Make sure to append a a SAS token to each source URL.
+The first directory that appears in this command is the source. The second one is the destination. Make sure to append a SAS token to each source URL.
 
 If you provide authorization credentials by using Azure Active Directory (Azure AD), you can omit the SAS token only from the destination URL. Make sure that you've set up the proper roles in your destination account. See [Option 1: Use Azure Active Directory](storage-use-azcopy-v10.md?toc=/azure/storage/blobs/toc.json#option-1-use-azure-active-directory).