docs: cleanup the explanation paragraphs at the start of each exercise.

exercises/move_semantics/move_semantics1.rs

@@ -1,5 +1,7 @@
 // move_semantics1.rs
-// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand for a hint.
+//
+// Execute `rustlings hint move_semantics1` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE
 

exercises/move_semantics/move_semantics2.rs

@@ -1,9 +1,11 @@
 // move_semantics2.rs
-// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand for a hint.
-
+//
 // Expected output:
 // vec0 has length 3 content `[22, 44, 66]`
 // vec1 has length 4 content `[22, 44, 66, 88]`
+//
+// Execute `rustlings hint move_semantics2` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE
 

exercises/move_semantics/move_semantics3.rs

@@ -1,7 +1,10 @@
 // move_semantics3.rs
-// Make me compile without adding new lines-- just changing existing lines!
-// (no lines with multiple semicolons necessary!)
-// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand for a hint.
+//
+// Make me compile without adding new lines-- just changing existing lines! (no
+// lines with multiple semicolons necessary!)
+//
+// Execute `rustlings hint move_semantics3` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE
 

exercises/move_semantics/move_semantics4.rs

@@ -1,8 +1,11 @@
 // move_semantics4.rs
-// Refactor this code so that instead of passing `vec0` into the `fill_vec` function,
-// the Vector gets created in the function itself and passed back to the main
-// function.
-// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand for a hint.
+//
+// Refactor this code so that instead of passing `vec0` into the `fill_vec`
+// function, the Vector gets created in the function itself and passed back to
+// the main function.
+//
+// Execute `rustlings hint move_semantics4` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE
 

exercises/move_semantics/move_semantics5.rs

@@ -1,7 +1,10 @@
 // move_semantics5.rs
-// Make me compile only by reordering the lines in `main()`, but without
-// adding, changing or removing any of them.
-// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand for a hint.
+//
+// Make me compile only by reordering the lines in `main()`, but without adding,
+// changing or removing any of them.
+//
+// Execute `rustlings hint move_semantics5` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE
 

exercises/move_semantics/move_semantics6.rs

@@ -1,6 +1,9 @@
 // move_semantics6.rs
-// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand for a hint.
+//
 // You can't change anything except adding or removing references.
+//
+// Execute `rustlings hint move_semantics6` or use the `hint` watch subcommand
+// for a hint.
 
 // I AM NOT DONE