diff --git a/docs/tutorial/LangImpl1.html b/docs/tutorial/LangImpl1.html
index 077575fe119..3cd26fa6261 100644
--- a/docs/tutorial/LangImpl1.html
+++ b/docs/tutorial/LangImpl1.html
@@ -293,7 +293,7 @@ if you typed in "1.23".  Feel free to extend it :).  Next we handle comments:
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl2.html b/docs/tutorial/LangImpl2.html
index 6dba2607714..dbd617cc507 100644
--- a/docs/tutorial/LangImpl2.html
+++ b/docs/tutorial/LangImpl2.html
@@ -870,7 +870,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl3.html b/docs/tutorial/LangImpl3.html
index b29f422a9e8..768a7838424 100644
--- a/docs/tutorial/LangImpl3.html
+++ b/docs/tutorial/LangImpl3.html
@@ -735,7 +735,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl4.html b/docs/tutorial/LangImpl4.html
index 378b29b3163..5a41f51fd6c 100644
--- a/docs/tutorial/LangImpl4.html
+++ b/docs/tutorial/LangImpl4.html
@@ -583,7 +583,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl5.html b/docs/tutorial/LangImpl5.html
index 9826844b004..8672cdd00f3 100644
--- a/docs/tutorial/LangImpl5.html
+++ b/docs/tutorial/LangImpl5.html
@@ -974,7 +974,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl6.html b/docs/tutorial/LangImpl6.html
index 33f4adbdebb..013da2e753f 100644
--- a/docs/tutorial/LangImpl6.html
+++ b/docs/tutorial/LangImpl6.html
@@ -899,7 +899,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();
diff --git a/docs/tutorial/LangImpl7.html b/docs/tutorial/LangImpl7.html
index 4ad3b9456bd..740e956d0f6 100644
--- a/docs/tutorial/LangImpl7.html
+++ b/docs/tutorial/LangImpl7.html
@@ -1085,7 +1085,7 @@ static int gettok() {
   if (LastChar == '#') {
     // Comment until end of line.
     do LastChar = getchar();
-    while (LastChar != EOF && LastChar != '\n' & LastChar != '\r');
+    while (LastChar != EOF && LastChar != '\n' && LastChar != '\r');
     
     if (LastChar != EOF)
       return gettok();