diff --git a/include/boost/algorithm/cxx11/all_of.hpp b/include/boost/algorithm/cxx11/all_of.hpp
index 4d1690f..2d05c75 100644
--- a/include/boost/algorithm/cxx11/all_of.hpp
+++ b/include/boost/algorithm/cxx11/all_of.hpp
@@ -12,6 +12,7 @@
 #ifndef BOOST_ALGORITHM_ALL_OF_HPP
 #define BOOST_ALGORITHM_ALL_OF_HPP
 
+#include <algorithm>	// for std::all_of, if available
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
 
diff --git a/include/boost/algorithm/cxx11/any_of.hpp b/include/boost/algorithm/cxx11/any_of.hpp
index 4389a13..f96358e 100644
--- a/include/boost/algorithm/cxx11/any_of.hpp
+++ b/include/boost/algorithm/cxx11/any_of.hpp
@@ -14,6 +14,7 @@
 #ifndef BOOST_ALGORITHM_ANY_OF_HPP
 #define BOOST_ALGORITHM_ANY_OF_HPP
 
+#include <algorithm>	// for std::any_of, if available
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
 
diff --git a/include/boost/algorithm/cxx11/none_of.hpp b/include/boost/algorithm/cxx11/none_of.hpp
index db670c6..5ca0e6d 100644
--- a/include/boost/algorithm/cxx11/none_of.hpp
+++ b/include/boost/algorithm/cxx11/none_of.hpp
@@ -12,6 +12,7 @@
 #ifndef BOOST_ALGORITHM_NONE_OF_HPP
 #define BOOST_ALGORITHM_NONE_OF_HPP
 
+#include <algorithm>	// for std::none_of, if available
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
 
diff --git a/include/boost/algorithm/cxx11/partition_copy.hpp b/include/boost/algorithm/cxx11/partition_copy.hpp
index 17db978..c9a8a35 100644
--- a/include/boost/algorithm/cxx11/partition_copy.hpp
+++ b/include/boost/algorithm/cxx11/partition_copy.hpp
@@ -12,6 +12,7 @@
 #ifndef BOOST_ALGORITHM_PARTITION_COPY_HPP
 #define BOOST_ALGORITHM_PARTITION_COPY_HPP
 
+#include <algorithm>	// for std::partition_copy, if available
 #include <utility>  // for make_pair
 
 #include <boost/range/begin.hpp>
diff --git a/include/boost/algorithm/cxx11/partition_point.hpp b/include/boost/algorithm/cxx11/partition_point.hpp
index f41fb30..6dc2d3d 100644
--- a/include/boost/algorithm/cxx11/partition_point.hpp
+++ b/include/boost/algorithm/cxx11/partition_point.hpp
@@ -20,7 +20,7 @@
 namespace boost { namespace algorithm {
 
 #if __cplusplus >= 201103L
-//  Use the C++11 versions of iota if it is available
+//  Use the C++11 versions of partition_point if it is available
 using std::partition_point;      // Section 25.3.13
 #else
 /// \fn partition_point ( ForwardIterator first, ForwardIterator last, Predicate p )
diff --git a/include/boost/algorithm/string/find.hpp b/include/boost/algorithm/string/find.hpp
index 304646d..cc99ca1 100644
--- a/include/boost/algorithm/string/find.hpp
+++ b/include/boost/algorithm/string/find.hpp
@@ -228,13 +228,13 @@ namespace boost {
         //! Find head algorithm
         /*!
             Get the head of the input. Head is a prefix of the string of the 
-            given size. If the input is shorter then required, whole input if considered 
+            given size. If the input is shorter then required, whole input is considered 
             to be the head.
 
             \param Input An input string
             \param N Length of the head
                 For N>=0, at most N characters are extracted.
-                For N<0, size(Input)-|N| characters are extracted.
+                For N<0, at most size(Input)-|N| characters are extracted.
             \return 
                 An \c iterator_range delimiting the match. 
                 Returned iterator is either \c Range1T::iterator or 
@@ -258,13 +258,13 @@ namespace boost {
         //! Find tail algorithm
         /*!
             Get the tail of the input. Tail is a suffix of the string of the 
-            given size. If the input is shorter then required, whole input if considered 
+            given size. If the input is shorter then required, whole input is considered 
             to be the tail.
 
             \param Input An input string
             \param N Length of the tail. 
                 For N>=0, at most N characters are extracted.
-                For N<0, size(Input)-|N| characters are extracted.
+                For N<0, at most size(Input)-|N| characters are extracted.
             \return 
                 An \c iterator_range delimiting the match. 
                 Returned iterator is either \c RangeT::iterator or 
diff --git a/string/doc/usage.xml b/string/doc/usage.xml
index a30d366..142bb2e 100644
--- a/string/doc/usage.xml
+++ b/string/doc/usage.xml
@@ -135,12 +135,12 @@
         &lt;&lt; endl; // prints "command.com is an executable"
     
     //..
-    char text1[]="hello world!";
+    char text1[]="hello";
     cout 
         &lt;&lt; text1 
-        &lt;&lt; (all( text1, is_lower() )? "is": "is not")
+        &lt;&lt; (all( text1, is_lower() )? " is": " is not")
         &lt;&lt; " written in the lower case" 
-        &lt;&lt; endl; // prints "hello world! is written in the lower case"
+        &lt;&lt; endl; // prints "hello is written in the lower case"
         </programlisting>
         <para>
             The predicates determine whether if a substring is contained in the input string
@@ -149,6 +149,11 @@
             simply contains the substring or if both strings are equal. See the reference for 
             <headername>boost/algorithm/string/predicate.hpp</headername> for more details. 
         </para>
+        <para>  
+            Note that if we had used "hello world" as the input to the test, it would have
+            output "hello world is not written in the lower case" because the space in the
+            input string is not a lower case letter.
+        </para>
         <para>  
             In addition the algorithm <functionname>all()</functionname> checks
             all elements of a container to satisfy a condition specified by a predicate. 
@@ -163,7 +168,7 @@
         <title>Trimming</title>
         
         <para>
-            When parsing the input from a user, strings usually have unwanted leading or trailing 
+            When parsing the input from a user, strings often have unwanted leading or trailing 
             characters. To get rid of them, we need trim functions:
         </para>
         <programlisting>