src/database/sql: run gofmt

Run gofmt on a source file.

Change-Id: I180d5cc7425fc5d8e9cf63005ac692f361beb1ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/508497
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Eli Bendersky <eliben@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

src/database/sql/sql.go

@@ -2949,7 +2949,7 @@ func (rs *Rows) initContextClose(ctx, txctx context.Context) {
 	go rs.awaitDone(ctx, txctx, closectx)
 }
 
-// awaitDone blocks until ctx, txctx, or closectx is canceled. 
+// awaitDone blocks until ctx, txctx, or closectx is canceled.
 // The ctx is provided from the query context.
 // If the query was issued in a transaction, the transaction's context
 // is also provided in txctx, to ensure Rows is closed if the Tx is closed.