diff --git a/HISTORY b/HISTORY
index 7563318..e1b45a5 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,4 +1,5 @@
 Mar. 2 2016
+Added a new YARD sample
 Fixed a crash bug when unreferencing a garbage
 Fixed a multiple disposing bug when an error occurs in an expression
 
diff --git a/core/my_basic.c b/core/my_basic.c
index 6fa70c7..b9981f5 100755
--- a/core/my_basic.c
+++ b/core/my_basic.c
@@ -2864,10 +2864,10 @@ static char* mb_strupr(char* s) {
 static int mb_uu_ischar(char* ch) {
 	/* Copyright 2008, 2009 Bjoern Hoehrmann, http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ */
 	/* Determine whether a buffer is a UTF8 encoded character, and return taken bytes */
-#define _TAKE(__ch, __c, __r) do { __c = *__ch++; __r++; } while(0)
-#define _COPY(__ch, __c, __r, __cp) do { _TAKE(__ch, __c, __r); __cp = (__cp << 6) | ((unsigned char)__c & 0x3Fu); } while(0)
-#define _TRANS(__m, __cp, __g) do { __cp &= ((__g[(unsigned char)c] & __m) != 0); } while(0)
-#define _TAIL(__ch, __c, __r, __cp, __g) do { _COPY(__ch, __c, __r, __cp); _TRANS(0x70, __cp, __g); } while(0)
+#	define _TAKE(__ch, __c, __r) do { __c = *__ch++; __r++; } while(0)
+#	define _COPY(__ch, __c, __r, __cp) do { _TAKE(__ch, __c, __r); __cp = (__cp << 6) | ((unsigned char)__c & 0x3Fu); } while(0)
+#	define _TRANS(__m, __cp, __g) do { __cp &= ((__g[(unsigned char)c] & __m) != 0); } while(0)
+#	define _TAIL(__ch, __c, __r, __cp, __g) do { _COPY(__ch, __c, __r, __cp); _TRANS(0x70, __cp, __g); } while(0)
 	static const unsigned char range[] = {
 		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -2909,10 +2909,10 @@ static int mb_uu_ischar(char* ch) {
 	case 11: _COPY(ch, c, result, codepoint); _TRANS(0x60, codepoint, range); _TAIL(ch, c, result, codepoint, range); _TAIL(ch, c, result, codepoint, range); return result;
 	default: return 0;
 	}
-#undef _TAKE
-#undef _COPY
-#undef _TRANS
-#undef _TAIL
+#	undef _TAKE
+#	undef _COPY
+#	undef _TRANS
+#	undef _TAIL
 }
 
 static int mb_uu_strlen(char* ch) {
diff --git a/shell/main.c b/shell/main.c
index c993d37..fa0eb11 100755
--- a/shell/main.c
+++ b/shell/main.c
@@ -222,7 +222,7 @@ static void _tidy_mem_pool(bool_t force) {
 }
 
 static void _open_mem_pool(void) {
-#define N 22
+#	define N 22
 	size_t szs[N];
 	size_t lst[N];
 	int i = 0;
@@ -279,7 +279,7 @@ static void _open_mem_pool(void) {
 		pool[i].size = lst[i];
 		pool[i].stack = 0;
 	}
-#undef N
+#	undef N
 }
 
 static void _close_mem_pool(void) {