Conversions: Changed "=" to act like "to" in implicit conversions (#4553)

lib/DDG/Goodie/Conversions.pm

@@ -281,7 +281,7 @@ handle query => sub {
         || (   "" eq $left_num
             && "" eq $right_num
             && $question !~ qr/convert/i
-            && $connecting_word !~ qr/to/i ))
+            && $connecting_word !~ qr/to|=/i ))
     {
         $factor = $right_num;
         @matches = reverse @matches;

t/Conversions.t

@@ -2194,6 +2194,14 @@ ddg_goodie_test(
             physical_quantity => 'volume'
         })
     ),
+    'oz = ml' => test_zci(
+        '', structured_answer => make_answer({
+            raw_input => '1',
+            from_unit => 'impfluidounce',
+            to_unit => 'millilitre',
+            physical_quantity => 'volume'
+        })
+    ),
     'miles to nautical' => test_zci(
         '', structured_answer => make_answer({
             raw_input => '1',