[ENSCORESW-734]. Forcing us to use proper content types rather than text/plain which is lazy

lib/EnsEMBL/REST/View/FASTAText.pm

@@ -8,7 +8,7 @@ sub process {
   my ($self, $c, $stash_key) = @_;
   $stash_key ||= 'rest';
   $c->res->body(${$self->encode_seq($c, $stash_key)});
-  $c->res->headers->header('Content-Type' => 'text/plain');
+  $c->res->headers->header('Content-Type' => 'text/x-fasta');
   return 1;
 }
 

lib/EnsEMBL/REST/View/GFF3.pm

@@ -27,7 +27,7 @@ sub process {
     $gff->print_feature($f);
   }
   $c->res->body(${$output_fh->string_ref()});
-  $c->res->headers->header('Content-Type' => 'text/plain');
+  $c->res->headers->header('Content-Type' => 'text/x-gff3');
   return 1;
 }
 

lib/EnsEMBL/REST/View/NHTree.pm

@@ -8,7 +8,7 @@ sub process {
   my ($self, $c, $stash_key) = @_;
   $c->res->body(${$self->encode_nh($c, $stash_key)});
   $self->set_content_disposition($c, 'nh', $stash_key);
-  $c->res->headers->header('Content-Type' => 'text/plain');
+  $c->res->headers->header('Content-Type' => 'text/x-nh');
   return 1;
 }
 

lib/EnsEMBL/REST/View/PhyloXML.pm

@@ -8,7 +8,7 @@ sub process {
   my ($self, $c, $stash_key) = @_;
   $c->res->body(${$self->encode_phyloxml($c, $stash_key)});
   $self->set_content_disposition($c, 'xml', $stash_key);
-  $c->res->headers->header('Content-Type' => 'text/xml');
+  $c->res->headers->header('Content-Type' => 'text/x-phyloxml+xml');
   return 1;
 }