Ruby: rack - use Mimetype rather than MimeType in predicate names for consistency with concepts

ruby/ql/lib/codeql/ruby/frameworks/rack/internal/Mime.qll

@@ -5,7 +5,7 @@
 private import codeql.ruby.ApiGraphs
 private import codeql.ruby.DataFlow
 
-private predicate mimeTypeMatches(string ext, string mimeType) {
+private predicate mimetypeMatches(string ext, string mimeType) {
   ext = ".123" and mimeType = "application/vnd.lotus-1-2-3"
   or
   ext = ".3dml" and mimeType = "text/vnd.in3d.3dml"
@@ -1306,6 +1306,6 @@ module Mime {
     }
 
     /** Gets the canonical MIME type string returned by this call. */
-    string getMimeType() { mimeTypeMatches(this.getExtension(), result) }
+    string getMimetype() { mimetypeMatches(this.getExtension(), result) }
   }
 }

ruby/ql/test/library-tests/frameworks/rack/Rack.ql

@@ -13,7 +13,7 @@ query predicate rackResponseContentTypes(
 }
 
 query predicate mimetypeCalls(Rack::Mime::MimetypeCall c, string mimetype) {
-  mimetype = c.getMimeType()
+  mimetype = c.getMimetype()
 }
 
 query predicate redirectResponses(Rack::Response::RedirectResponse resp, DataFlow::Node location) {