Hi
I've replaced unused variables in database/sql with blank identifiers to improve code readability.
This change has no impact on the functionality of the code, but makes it easier to read and understand.
Change-Id: I701e93fd9bf86725f411085bf2e8f8e6b235af14
GitHub-Last-Rev: 
eb40bd5e2ef9e28871fae2e97b4433e8d6e2c652
GitHub-Pull-Request: golang/go#58986
Reviewed-on: https://go-review.googlesource.com/c/go/+/475675
Commit-Queue: Ian Lance Taylor <iant@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
        // to the column converter.
        nvc, ok := si.(driver.NamedValueChecker)
        if !ok {
-               nvc, ok = ci.(driver.NamedValueChecker)
+               nvc, _ = ci.(driver.NamedValueChecker)
        }
        cci, ok := si.(driver.ColumnConverter)
        if ok {
 
        // Loop through all the arguments, checking each one.
        // If no error is returned simply increment the index
-       // and continue. However if driver.ErrRemoveArgument
+       // and continue. However, if driver.ErrRemoveArgument
        // is returned the argument is not included in the query
        // argument list.
        var err error