Removed // comments from comment (to emphasize C compatibility)

[SVN r14211]

include/boost/preprocessor/limits.hpp

@@ -40,5 +40,5 @@ BOOST_PP_REPEAT() and BOOST_PP_REPEAT_FROM_TO()).</p>
 #define BOOST_PP_LIMIT_MAG 128
 
 /** <p>Expands to the maximum tuple size supported by the library.</p> */
-#define BOOST_PP_LIMIT_TUPLE 16
+#define BOOST_PP_LIMIT_TUPLE 32
 #endif

include/boost/preprocessor/tuple.hpp

@@ -24,9 +24,9 @@ constitutes a single macro parameter.</p>
 <p>Examples of tuples:</p>
 
 <pre>
-(const, volatile)    // 2-tuple
-(*, /, %)            // 3-tuple
-(1, "2", '3', (4,5)) // 4-tuple
+(const, volatile)    /* 2-tuple */
+(*, /, %)            /* 3-tuple */
+(1, "2", '3', (4,5)) /* 4-tuple */
 </pre>
 
 <p>Tuples can be used for representing structured data.</p>