Merge #11635: trivial: Fix typo – alreardy → already

7536b08c1 trivial: Fix typo – alreardy → already (practicalswift)

Pull request description:

  Fix typo: alreardy → already.

Tree-SHA512: b53f7540e516bb0a106873983aea8cb35f8e6690153b2c737ede79be7dae7b9e5f644859204ab6419de0f900ffac50bfdd775259b24ad8c12993b4c792fe836b

src/validation.cpp

@@ -170,7 +170,7 @@ namespace {
       * BLOCK_FAILED_VALID blocks in a set should be just fine and work just as
       * well.
       *
-      * Because we alreardy walk mapBlockIndex in height-order at startup, we go
+      * Because we already walk mapBlockIndex in height-order at startup, we go
       * ahead and mark descendants of invalid blocks as FAILED_CHILD at that time,
       * instead of putting things in this set.
       */