Fix spelling in recent merges

Author: jonatack

src/cluster_linearize.h

@@ -671,7 +671,7 @@ class SearchCandidateFinder
         m_sorted_to_original(depgraph.TxCount()),
         m_original_to_sorted(depgraph.PositionRange())
     {
-        // Determine reordering mapping, by sorting by decreasing feerate. Unusued positions are
+        // Determine reordering mapping, by sorting by decreasing feerate. Unused positions are
         // not included, as they will never be looked up anyway.
         ClusterIndex sorted_pos{0};
         for (auto i : depgraph.Positions()) {

src/ipc/protocol.h

@@ -54,7 +54,7 @@ class Protocol
     //! The optional `ready_fn` callback will be called after the event loop is
     //! created but before it is started. This can be useful in tests to trigger
     //! client connections from another thread as soon as the event loop is
-    //! available, but should not be neccessary in normal code which starts
+    //! available, but should not be necessary in normal code which starts
     //! clients and servers independently.
     virtual void serve(int fd, const char* exe_name, interfaces::Init& init, const std::function<void()>& ready_fn = {}) = 0;
 

src/pow.cpp

@@ -135,7 +135,7 @@ bool PermittedDifficultyTransition(const Consensus::Params& params, int64_t heig
 }
 
 // Bypasses the actual proof of work check during fuzz testing with a simplified validation checking whether
-// the most signficant bit of the last byte of the hash is set.
+// the most significant bit of the last byte of the hash is set.
 bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params& params)
 {
 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION