Fix canonical data & minor corrections in Markdown files

Author: kahgoh

exercises/intergalactic-transmission/canonical-data.json

@@ -25,12 +25,12 @@
         },
         {
           "uuid": "97f27f98-8020-402d-be85-f21ba54a6df0",
-          "description": "0x02 is transmitted as 0x0100",
+          "description": "0x02 is transmitted as 0x0300",
           "property": "transmitSequence",
           "input": {
             "message": ["0x02"]
           },
-          "expected": ["0x01", "0x00"]
+          "expected": ["0x03", "0x00"]
         },
         {
           "uuid": "24712fb9-0336-4e2f-835e-d2350f29c420",

exercises/intergalactic-transmission/instructions.md

@@ -1,16 +1,15 @@
 # Instructions
 
-Your job is to help implement the message sequencer to calculate the transmission sequence and the decoder for receiving messages.
+Your job is to help implement the message sequencer, which calculates the transmission sequence, and the decoder for receiving messages.
 
 A parity bit is simple way of detecting transmission errors.
 The transmitters and receivers can only transmit and receive _exactly_ eight bits at a time (including the parity bit).
 The parity bit is set so that there is an _even_ number 1s in each transmission and is always the first bit from the right.
 So if the receiver receives `11000001`, `01110101` or `01000000` (i.e. a transmission with an odd number of 1 bits), it knows there is an error.
 
-However, messages are rarely this short.
-The message needs to be transmitted in a sequence when they are longer.
+However, messages are rarely this short, and need to be transmitted in a sequence when they are longer.
 
-For example, consider the message `11000000 00000001 11000000 11011110` (or in `C0 01 C0 DE` hex).
+For example, consider the message `11000000 00000001 11000000 11011110` (or `C0 01 C0 DE` in hex).
 
 Since each transmission contains exactly eight bits, it can only contain seven bits of data and the parity bit.
 A parity bit must then be inserted after every seven bits of data:

exercises/intergalactic-transmission/introduction.md

@@ -10,7 +10,7 @@ Now imagine the consequences:
 - Losing contact with the Kepler Whirl system when "save new worm hole" becomes "cave new worm hole".
 - Or plunging the universe into existential horror by replacing a cowboy emoji 🤠 with a clown emoji 🤡.
 
-Detecting corrupted messages isn’t just important — it's critical.
+Detecting corrupted messages isn't just important — it's critical.
 The receiver _must_ know when something has gone wrong before disaster strikes.
 
 But how?