fix space

Author: benoitc

src/hackney_url.erl

@@ -332,6 +332,8 @@ partial_pathencode(<<C, Rest/binary>> = Bin, Acc) ->
         C >= $a, C =< $z -> partial_pathencode(Rest, <<Acc/binary, C>>);
         C =:= $.; C =:= $-; C =:= $~; C =:= $_ ->
             partial_pathencode(Rest, <<Acc/binary, C>>);
+        C =:= $  ->
+		    partial_pathencode(Rest, <<Acc/binary, $+>>);
         C =:= $% ->
             %% special case, when a % is passed to the path, check if
             %% it's a valid escape sequence. If the sequence is valid we