improved Markup and fixed small error (#185)

README.md

@@ -147,15 +147,15 @@ The input handling of gui.cs is similar in some ways to Emacs and the
 Midnight Commander, so you can expect some of the special key
 combinations to be active.
 
-The key ESC can act as an Alt modifier (or Meta in Emacs parlance), to
+The key `ESC` can act as an Alt modifier (or Meta in Emacs parlance), to
 allow input on terminals that do not have an alt key.  So to produce
-the sequence Alt-F, you can press either Alt-F, or ESC folowed by the key F.
+the sequence `Alt-F`, you can press either `Alt-F`, or `ESC` followed by the key `F`.
 
-To enter the key ESC, you can either press ESC and wait 100
-milliseconds, or you can press ESC twice.
+To enter the key `ESC`, you can either press `ESC` and wait 100
+milliseconds, or you can press `ESC` twice.
 
-ESC-0, and ESC_1 through ESC-9 have a special meaning, they map to
-F10, and F1 to F9 respectively.
+`ESC-0`, and `ESC-1` through `ESC-9` have a special meaning, they map to
+`F10`, and `F1` to `F9` respectively.
 
 # Driver model