[cleanup] remove trailing whitespace from source code files

example/conversion_use_case.cpp

@@ -1,4 +1,4 @@
-//  endian/example/conversion_use_case.cpp 
+//  endian/example/conversion_use_case.cpp
 
 //  Copyright Beman Dawes 2014
 
@@ -47,5 +47,5 @@ int main()
     out_rec.balance = boost::endian::native_to_big(out_rec.balance);  // reverse if needed
     out.write((const char*)&out_rec, sizeof(out_rec));
   }
-    
+
 }

example/endian_example.cpp

@@ -18,7 +18,7 @@
 
 using namespace boost::endian;
 
-namespace 
+namespace
 {
   //  This is an extract from a very widely used GIS file format. Why the designer
   //  decided to mix big and little endians in the same file is not known. But
@@ -39,7 +39,7 @@ namespace
 int main(int, char* [])
 {
   header h;
-  
+
   BOOST_STATIC_ASSERT(sizeof(h) == 16U);  // reality check
 
   h.file_code   = 0x01020304;
@@ -54,7 +54,7 @@ int main(int, char* [])
   //  does bulk I/O operations, <cstdio> fopen/fwrite is used for I/O in this example.
 
   std::FILE* fi = std::fopen(filename, "wb");  // MUST BE BINARY
-  
+
   if (!fi)
   {
     std::cout << "could not open " << filename << '\n';

example/use_cases.cpp

@@ -121,7 +121,7 @@ using std::endl;
 //  Recommended approach when conversion time is a concern
   //
   //  Conversion time is a concert with this application because (1) any conversions
-  //  performed in the loop will consume a great deal of time and because (2) 
+  //  performed in the loop will consume a great deal of time and because (2)
   //  computation time will be much greater than I/O time.
 
   {