diff --git a/docs/source/doc/kaleidoscope/PythonLangImpl1.rst b/docs/source/doc/kaleidoscope/PythonLangImpl1.rst
index 7b1c3a6..00b16fb 100644
--- a/docs/source/doc/kaleidoscope/PythonLangImpl1.rst
+++ b/docs/source/doc/kaleidoscope/PythonLangImpl1.rst
@@ -115,13 +115,13 @@ following simple example computes `Fibonacci
 numbers <http://en.wikipedia.org/wiki/Fibonacci_number>`_:
 
 
-.. code-block:: python
+.. code-block:: text
 
    # Compute the x'th fibonacci number. 
-   def fib(x):
-      if x < 3:
+   def fib(x)
+      if x < 3
          return 1
-      else:
+      else
          return fib(x-1)+fib(x-2)
    
    # This expression will compute the 40th number.
@@ -226,7 +226,7 @@ the line.
    
    # Regular expressions that tokens and comments of our language.
    REGEX_NUMBER = re.compile('[0-9]+(?:.[0-9]+)?')
-   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9]\ *')
+   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9]*')
    REGEX_COMMENT = re.compile('#.*')
    
 
diff --git a/docs/source/doc/kaleidoscope/PythonLangImpl2.rst b/docs/source/doc/kaleidoscope/PythonLangImpl2.rst
index 8c915db..a375512 100644
--- a/docs/source/doc/kaleidoscope/PythonLangImpl2.rst
+++ b/docs/source/doc/kaleidoscope/PythonLangImpl2.rst
@@ -772,7 +772,7 @@ Lexer
    
    # Regular expressions that tokens and comments of our language.
    REGEX_NUMBER = re.compile('[0-9]+(?:\.[0-9]+)?') 
-   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9] *') 
+   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9]*')
    REGEX_COMMENT = re.compile('#.*')
    
    def Tokenize(string): 
@@ -811,7 +811,7 @@ Lexer
             yield CharacterToken(string[0])
             string = string[1:]
    
-   yield EOFToken()
+      yield EOFToken()
    
 
 
diff --git a/docs/source/doc/kaleidoscope/PythonLangImpl3.rst b/docs/source/doc/kaleidoscope/PythonLangImpl3.rst
index 5719bb2..15ec212 100644
--- a/docs/source/doc/kaleidoscope/PythonLangImpl3.rst
+++ b/docs/source/doc/kaleidoscope/PythonLangImpl3.rst
@@ -1058,7 +1058,7 @@ Main driver code.
       '+': 20, 
       '-': 20, 
       '*': 40 
-   }
+      }
    
       # Run the main "interpreter loop". 
       while True: 
diff --git a/docs/source/doc/kaleidoscope/PythonLangImpl6.rst b/docs/source/doc/kaleidoscope/PythonLangImpl6.rst
index 2e98cef..8ff31d4 100644
--- a/docs/source/doc/kaleidoscope/PythonLangImpl6.rst
+++ b/docs/source/doc/kaleidoscope/PythonLangImpl6.rst
@@ -847,7 +847,7 @@ Lexer
    
    # Regular expressions that tokens and comments of our language.
    REGEX_NUMBER = re.compile('[0-9]+(?:\.[0-9]+)?') 
-   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9] *') 
+   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9]*')
    REGEX_COMMENT = re.compile('#.*')
    
    def Tokenize(string): 
diff --git a/docs/source/doc/kaleidoscope/PythonLangImpl7.rst b/docs/source/doc/kaleidoscope/PythonLangImpl7.rst
index d3dfb74..629608c 100644
--- a/docs/source/doc/kaleidoscope/PythonLangImpl7.rst
+++ b/docs/source/doc/kaleidoscope/PythonLangImpl7.rst
@@ -1000,7 +1000,7 @@ Lexer
    
    # Regular expressions that tokens and comments of our language.
    REGEX_NUMBER = re.compile('[0-9]+(?:\.[0-9]+)?') 
-   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9] *') 
+   REGEX_IDENTIFIER = re.compile('[a-zA-Z][a-zA-Z0-9] *')
    REGEX_COMMENT = re.compile('#.*')
    
    def Tokenize(string):