indent(1): Properly handle the wide string literal and wide char constant L.

indent(1) treated the "L" in "L'a'" as if it were an identifier and forced
a space character after it, breaking valid code.

PR:		143090
MFC after:	2 weeks

usr.bin/indent/indent.c

@@ -1004,6 +1004,16 @@ main(int argc, char **argv)
 	    ps.want_blank = true;
 	    break;
 
+	case strpfx:
+	    if (ps.want_blank)
+		*e_code++ = ' ';
+	    for (t_ptr = token; *t_ptr; ++t_ptr) {
+		CHECK_SIZE_CODE;
+		*e_code++ = *t_ptr;
+	    }
+	    ps.want_blank = false;
+	    break;
+
 	case period:		/* treat a period kind of like a binary
 				 * operation */
 	    *e_code++ = '.';	/* move the period into line */

usr.bin/indent/indent_codes.h

@@ -68,3 +68,4 @@
 #define ifhead		30
 #define elsehead	31
 #define period		32
+#define strpfx		33

usr.bin/indent/lexi.c

@@ -237,6 +237,11 @@ lexi(void)
 		    fill_buffer();
 	    }
 	*e_token++ = '\0';
+
+	if (s_token[0] == 'L' && s_token[1] == '\0' &&
+	      (*buf_ptr == '"' || *buf_ptr == '\''))
+	    return (strpfx);
+
 	while (*buf_ptr == ' ' || *buf_ptr == '\t') {	/* get rid of blanks */
 	    if (++buf_ptr >= buf_end)
 		fill_buffer();