Merge pull request #3019 from kuettler/add_table_headers

Add table headers in ddoc function tables

std/array.d

@@ -5,6 +5,8 @@ Functions and types that manipulate built-in arrays and associative arrays.
 This module provides all kinds of functions to create, manipulate or convert arrays:
 
 $(BOOKTABLE ,
+$(TR $(TH Function Name) $(TH Description)
+)
     $(TR $(TD $(D $(LREF _array)))
         $(TD Returns a copy of the input in a newly allocated dynamic _array.
     ))

std/format.d

@@ -12,6 +12,8 @@
    This module centers around two functions:
 
 $(BOOKTABLE ,
+$(TR $(TH Function Name) $(TH Description)
+)
     $(TR $(TD $(D $(LREF formattedRead)))
         $(TD Reads values according to the _format string from an InputRange.
     ))
@@ -27,6 +29,8 @@ $(BOOKTABLE ,
    Two functions have been added for convenience:
 
 $(BOOKTABLE ,
+$(TR $(TH Function Name) $(TH Description)
+)
     $(TR $(TD $(D $(LREF _format)))
         $(TD Returns a GC-allocated string with the formatting result.
     ))

std/functional.d

@@ -9,6 +9,8 @@ $(LINK2 std_algorithm.html, std.algorithm) or $(LINK2 std_range.html,
 std.range).
 
 $(BOOKTABLE ,
+$(TR $(TH Function Name) $(TH Description)
+)
     $(TR $(TD $(D $(LREF adjoin)))
         $(TD Joins a couple of functions into one that executes the original
         functions independently and returns a tuple with all the results.