tog.1: use consistent syntax for Control key combinations
diff --git a/tog/tog.1 b/tog/tog.1
index 56f9820..c652b73 100644
--- a/tog/tog.1
+++ b/tog/tog.1
@@ -90,9 +90,9 @@ are as follows:
Move the selection cursor down.
.It Cm Up-arrow, k, <, Comma
Move the selection cursor up.
-.It Cm Page-down, Ctrl-f
+.It Cm Page-down, Ctrl+f
Move the selection cursor down one page.
-.It Cm Page-up, Ctrl-b
+.It Cm Page-up, Ctrl+b
Move the selection cursor up one page.
.It Cm Enter, Space
Open a