Correct a couple years of accumulated typos

coins/bitcoin/src/rpc.rs

@@ -84,7 +84,7 @@ impl Rpc {
     for line in res.split('\n') {
       // This doesn't check if the arguments are as expected
       // This is due to Bitcoin supporting a large amount of optional arguments, which
-      // occassionally change, with their own mechanism of text documentation, making matching off
+      // occasionally change, with their own mechanism of text documentation, making matching off
       // it a quite involved task
       // Instead, once we've confirmed the methods are present, we assume our arguments are aligned
       // Else we'll error at time of call

coins/bitcoin/src/wallet/send.rs

@@ -186,7 +186,7 @@ impl SignableTransaction {
     //  src/policy/policy.cpp#L295-L298
     // implements this as expected
 
-    // Technically, it takes whatever's greater, the weight or the amount of signature operatons
+    // Technically, it takes whatever's greater, the weight or the amount of signature operations
     // multiplied by DEFAULT_BYTES_PER_SIGOP (20)
     // We only use 1 signature per input, and our inputs have a weight exceeding 20
     // Accordingly, our inputs' weight will always be greater than the cost of the signature ops

coins/monero/src/wallet/scan.rs

@@ -397,7 +397,7 @@ impl Scanner {
         }
         let subaddress = *subaddress.unwrap();
 
-        // If it has torsion, it'll substract the non-torsioned shared key to a torsioned key
+        // If it has torsion, it'll subtract the non-torsioned shared key to a torsioned key
         // We will not have a torsioned key in our HashMap of keys, so we wouldn't identify it as
         // ours
         // If we did though, it'd enable bypassing the included burning bug protection