Add missing GoDocs

key.go

@@ -99,7 +99,7 @@ func (k KeyType) String() (str string) {
 	return ""
 }
 
-// Control keys. I know we could do this with an iota, but the values are very
+// Control keys. We could do this with an iota, but the values are very
 // specific, so we set the values explicitly to avoid any confusion.
 //
 // See also:

mouse.go

@@ -2,6 +2,9 @@ package tea
 
 import "errors"
 
+// MouseMsg contains information about a mouse event and are sent to a programs
+// update function when mouse activity occurs. Note that the mouse must first
+// be enabled via in order the mouse events to be received.
 type MouseMsg MouseEvent
 
 // MouseEvent represents a mouse event, which could be a click, a scroll wheel
@@ -29,6 +32,7 @@ func (m MouseEvent) String() (s string) {
 // MouseEventType indicates the type of mouse event occurring.
 type MouseEventType int
 
+// Mouse event types.
 const (
 	MouseUnknown MouseEventType = iota
 	MouseLeft