Fix count when parsing bottom command (#1240)

* Fix count when parsing `bottom` command

* Revert "Fix count when parsing `bottom` command"

This reverts commit a0b6bb5.

* Alternate implementation

* Add comment

eval.go

@@ -1447,7 +1447,7 @@ func (e *callExpr) eval(app *app, args []string) {
 			return
 		}
 		var moved bool
-		if e.count == 0 {
+		if e.count == 1 {
 			moved = app.nav.top()
 		} else {
 			moved = app.nav.move(e.count - 1)
@@ -1461,7 +1461,9 @@ func (e *callExpr) eval(app *app, args []string) {
 			return
 		}
 		var moved bool
-		if e.count == 0 {
+		if e.count == 1 {
+			// Different from Vim, which would treat a count of 1 as meaning to
+			// move to the first line (i.e. the top)
 			moved = app.nav.bottom()
 		} else {
 			moved = app.nav.move(e.count - 1)

opts.go

@@ -163,10 +163,10 @@ func init() {
 	gOpts.keys["l"] = &callExpr{"open", nil, 1}
 	gOpts.keys["<right>"] = &callExpr{"open", nil, 1}
 	gOpts.keys["q"] = &callExpr{"quit", nil, 1}
-	gOpts.keys["gg"] = &callExpr{"top", nil, 0}
-	gOpts.keys["<home>"] = &callExpr{"top", nil, 0}
-	gOpts.keys["G"] = &callExpr{"bottom", nil, 0}
-	gOpts.keys["<end>"] = &callExpr{"bottom", nil, 0}
+	gOpts.keys["gg"] = &callExpr{"top", nil, 1}
+	gOpts.keys["<home>"] = &callExpr{"top", nil, 1}
+	gOpts.keys["G"] = &callExpr{"bottom", nil, 1}
+	gOpts.keys["<end>"] = &callExpr{"bottom", nil, 1}
 	gOpts.keys["H"] = &callExpr{"high", nil, 1}
 	gOpts.keys["M"] = &callExpr{"middle", nil, 1}
 	gOpts.keys["L"] = &callExpr{"low", nil, 1}