[ruby/csv] All Enumerable based methods consume the same lines with other methods

This may have a performance penalty. We should benchmark this.

GitHub: fix https://github.com/ruby/csv/pull/260

Reported by Lhoussaine Ghallou. Thanks!!!

https://github.com/ruby/csv/commit/acc05116c5

lib/csv.rb

@@ -2592,14 +2592,7 @@ class CSV
   #   # Raises IOError (not opened for reading)
   #   csv.read
   def read
-    rows = []
-    enumerator = parser_enumerator
-    begin
-      while true
-        rows << enumerator.next
-      end
-    rescue StopIteration
-    end
+    rows = to_a
     if parser.use_headers?
       Table.new(rows, headers: parser.headers)
     else