Don't trigger log or lg without brackets (as these don't work) (#4249)

* Add sed command example

* Move to file section

* Don't trigger log without brackets. 

Quick fix for issue #4246

* Remove test that uses log(10)

* Update Calculator.t

* dont trigger ln without brackets either

* remove ln and log without bracket tests

* previously removed wrong test bring it back

lib/DDG/Goodie/Calculator.pm

@@ -150,7 +150,7 @@ handle query_nowhitespace => sub {
 
     # Grab expression.
     my $tmp_expr = spacing($query, 1);
-    return if ($tmp_expr eq $query) && ($query !~ /\de|ln|log|cos|tan|sin/i);     # If it didn't get spaced out, there are no operations to be done.
+    return if ($tmp_expr eq $query) && ($query !~ /\de|cos|tan|sin/i);     # If it didn't get spaced out, there are no operations to be done.
 
     # First replace named operations with their computable equivalents.
     while (my ($name, $operation) = each %named_operations) {

t/Calculator.t

@@ -328,12 +328,6 @@ ddg_goodie_test(
     'log(10 * 2)' => build_test(
         'log(10 * 2)'
     ),
-    'log 88' => build_test(
-        'log88'
-    ),
-    'ln 6' => build_test(
-        'ln6'
-    ),
     '1 + √25 =' => build_test(
         '1 + √25'
     ),