Intergalactic Transmission - Fix typos (#2572)

* Fix typos

* Update exercises/intergalactic-transmission/instructions.md

Co-authored-by: András B Nagy <[email protected]>

* Update exercises/intergalactic-transmission/instructions.md

---------

Co-authored-by: András B Nagy <[email protected]>

Author: ryanplusplus

exercises/intergalactic-transmission/instructions.md

@@ -7,7 +7,7 @@ Your job is to help implement
 
 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.
+The parity bit is set so that there is an _even_ number of 1 bits in each transmission, and the parity bit 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, and need to be transmitted in a sequence when they are longer.
@@ -40,7 +40,7 @@ Their parity bits are set to 1 so that they have an even number of 1 bits in the
 They are transmitted as `01110001` and `00011011` (or `71` and `1B` in hex).
 
 The last transmission (`1110`) has only four bits of data.
-Since exactly eight bits are transmitted at a time and the parity bit is the right most bit, three 0 bits and then the parity bit are added to make up eight bits.
+Since exactly eight bits are transmitted at a time and the parity bit is the rightmost bit, three 0 bits and then the parity bit are added to make up eight bits.
 It now looks like this (where `_` is the parity bit):
 
 ```text