applied Sanders fixes to dwm.1

dwm.1

@@ -33,16 +33,17 @@ prints version information to standard output, then exits.
 .SH USAGE
 .SS Status bar
 .TP
-Writing to standard input displays the text in the status text area.
+.B Standard input
+is read and displayed in the status text area.
 .TP
 .B Button[1-3]
-click onto a tag label focuses the specifc tag.
+click on a tag label focuses that tag.
 .TP
 .B Button[1,4]
-click focuses the previous tag.
+click on the bar focuses the previous tag.
 .TP
 .B Button[2,5]
-click focuses the next tag.
+click on the bar focuses the next tag.
 .SS Keyboard commands
 .TP
 .B Mod1-Return