Use more portable character for visible tabs due to mismatched width on Ubuntu.

defines.h

@@ -7,7 +7,7 @@
 # if __NetBSD__
 #  define BSD 1
 #  define POSIX 1
-# elsif __linux__
+# elif __linux__
 #  define USG 1
 #  define SVR4 1	/* locks */
 #  define POSIX 1

display.c

@@ -207,7 +207,7 @@ static void vtputc( unicode_t c) {
 		c &= 0xFF ;
 
 	if( c == '\t') {
-		sane_vtputc( viewtab ? 0x226B : ' ') ;	/* 0x226B: '≫' */
+		sane_vtputc( viewtab ? 0xBB : ' ') ;	/* 0xBB: '»' */
 		while( ((vtcol + taboff) % tabwidth) != 0)
 			sane_vtputc( ' ') ;
 	} else if( c < 0x20 || c == 0x7F) {

posix.c

@@ -149,27 +149,28 @@ void ttflush(void)
 		exit(15);
 }
 
-/*
- * Read a character from the terminal, performing no editing and doing no echo
- * at all.
- * Very simple on CPM, because the system can do exactly what you want.
+
+/* Read a character from the terminal, performing no editing and doing no
+   echo at all.
  */
-int ttgetc(void)
-{
+int ttgetc( void) {
 	static char buffer[ 32] ;
 	static int pending ;
 	unicode_t c ;
-	int count, bytes = 1, expected;
 
-	count = pending;
+	int count = pending ;
 	if( !count) {
 		count = read( 0, buffer, sizeof( buffer)) ;
 		if( count <= 0)
 			return 0 ;
+
 		pending = count ;
 	}
 
+	int bytes = 1 ;
 	c = (unsigned char) buffer[ 0] ;
+#if 0	// temporary fix for wsl
+
 	if (c >= 32 && c < 128)
 		goto done;
 
@@ -186,7 +187,7 @@ int ttgetc(void)
 	 * delay for some *very* unusual utf8 character
 	 * input.
 	 */
-	expected = 2;
+	int expected = 2;
 	if ((c & 0xe0) == 0xe0)
 		expected = 6;
 
@@ -220,6 +221,7 @@ int ttgetc(void)
 	bytes = utf8_to_unicode(buffer, 0, pending, &c);
 
 done:
+#endif
 	pending -= bytes ;
 	memmove( buffer, buffer + bytes, pending) ;
 	return c ;