diff --git a/include/boost/range/sub_range.hpp b/include/boost/range/sub_range.hpp
index 8b1963a..5e231c7 100755
--- a/include/boost/range/sub_range.hpp
+++ b/include/boost/range/sub_range.hpp
@@ -23,7 +23,7 @@ namespace boost
     template< class Range > 
     class sub_range : public iterator_range< BOOST_DEDUCED_TYPENAME result_iterator_of<Range>::type > 
     {
-		
+      
         typedef BOOST_DEDUCED_TYPENAME result_iterator_of<Range>::type iterator_t;
         typedef iterator_range< iterator_t  > base;
         
@@ -65,8 +65,7 @@ namespace boost
         size_type size() const
         {
             return base::size();
-        }
-		
+        }   
 
     };
         
diff --git a/test/algorithm_example.cpp b/test/algorithm_example.cpp
index fba45c6..92b1049 100755
--- a/test/algorithm_example.cpp
+++ b/test/algorithm_example.cpp
@@ -51,8 +51,8 @@ int main()
 {
     const int N = 5;                     
     std::vector<int> my_vector;
-	int values[] = { 1,2,3,4,5,6,7,8,9 };
-	my_vector.assign( values, values + 9 );
+    int values[] = { 1,2,3,4,5,6,7,8,9 };
+    my_vector.assign( values, values + 9 );
     typedef std::vector<int>::iterator iterator;
     std::pair<iterator,iterator>       my_view( boost::begin( my_vector ), 
                                                 boost::begin( my_vector ) + N );
diff --git a/test/iterator_range.cpp b/test/iterator_range.cpp
index 77030da..4088e78 100755
--- a/test/iterator_range.cpp
+++ b/test/iterator_range.cpp
@@ -34,7 +34,7 @@ struct add_one
 
 void check_iterator_range()
 {
-	
+   
     typedef string::iterator               iterator;
     typedef string::const_iterator         const_iterator;
     typedef iterator_range<iterator>       irange;
diff --git a/test/string.cpp b/test/string.cpp
index 603bde8..c43ea52 100755
--- a/test/string.cpp
+++ b/test/string.cpp
@@ -83,7 +83,7 @@ void check_char()
     
     BOOST_CHECK_EQUAL( begin( my_string ), my_string );
     const char* end2 = begin( my_string ) + size( my_string );
-	const char* end3 = end( my_string );
+   const char* end3 = end( my_string );
     BOOST_CHECK_EQUAL( end3, end2 );
     BOOST_CHECK_EQUAL( empty( my_string ), (my_string == 0 || my_string[0] == char()) );
     BOOST_CHECK_EQUAL( size( my_string ), my_string_length );
@@ -93,7 +93,7 @@ void check_char()
     char to_search = 'n';
     BOOST_CHECK( find( char_s, to_search ) != end( char_s ) );
     BOOST_CHECK( find( my_string, to_search ) != end( my_string ) );
-	
+   
 }
 
 
diff --git a/test/sub_range.cpp b/test/sub_range.cpp
index fb59d1e..9cb1689 100755
--- a/test/sub_range.cpp
+++ b/test/sub_range.cpp
@@ -34,8 +34,8 @@ struct add_one
 
 void check_iterator_range()
 {
-	
-	
+   
+   
     typedef string::iterator               iterator;
     typedef string::const_iterator         const_iterator;
     typedef iterator_range<iterator>       irange;
@@ -79,7 +79,7 @@ void check_iterator_range()
     
     string res  = copy_range<string>( r );
     BOOST_CHECK( equal( res.begin(), res.end(), r.begin() ) );
-	
+   
 }