         while true {
             // Print the prompt
             print("\(currentPc.format(PrintOption.HexWith0x.rawValue))> ", terminator: "") // Prints PC without a newline
-            // Read input
-            let input = readInput() // Read input (whitespace is already trimmed)
+            let input = readInput() // Read input (whitespace is already trimmed from either end)
             if input.rangeOfString(commandBeginning)?.minElement() == input.startIndex || input == "" {
                 // This is a command, not an instruction; parse it as such
-                // Also ignore any PC update logic
                 executeCommand(Command(input))
             } else {
                 // This is an instruction, not a command; parse it as such

                        dupes.forEach({ print($0, terminator: ++counter < end ? " " : "\n") })
                        continue
                    }
                    break
                default:
                    // Increment the program counter, store its new value in the register file, and then execute
                    let dupes = findDuplicateLabels(instruction.labels)

            currentInstruction = currentInstruction!.next
        }
        print("Execution has caught up. Auto-execute of instructions is \(self.autoexecute ? "enabled" : "disabled").")
        if self.autoexecute {
            // Auto-execution is enabled, so wipe any stored pausedPc value
            self.pausedPc = nil
        } else {
            // Update the pausedPc to note that execution has come this far
            self.pausedPc = self.currentPc
        }
