spell identifier correctly.

llvm-svn: 43718
diff --git a/llvm/docs/tutorial/LangImpl3.html b/llvm/docs/tutorial/LangImpl3.html
index 4209327..e16d1be 100644
--- a/llvm/docs/tutorial/LangImpl3.html
+++ b/llvm/docs/tutorial/LangImpl3.html
@@ -818,12 +818,12 @@
 static ExprAST *ParseExpression();
 
 /// identifierexpr
-///   ::= identifer
-///   ::= identifer '(' expression* ')'
+///   ::= identifier
+///   ::= identifier '(' expression* ')'
 static ExprAST *ParseIdentifierExpr() {
   std::string IdName = IdentifierStr;
   
-  getNextToken();  // eat identifer.
+  getNextToken();  // eat identifier.
   
   if (CurTok != '(') // Simple variable ref.
     return new VariableExprAST(IdName);