Don't accept l as a suffix for floating point numbers in the scanner

- We're never going to support long doubles, so don't pretend.

src/sc_man_scanner.re

@@ -36,7 +36,7 @@ std2:
 	L	= [a-zA-Z_];
 	H	= [a-fA-F0-9];
 	E	= [Ee] [+-]? D+;
-	FS	= [fFlL];
+	FS	= [fF];
 	IS	= [uUlL];
 	ESC	= [\\] ([abcfnrtv?'"\\] | "x" H+ | O+);