fix unexpected behaviour when get uri with path and query parameter

spec/http_spec.cr

@@ -1,5 +1,6 @@
 require "./spec_helper"
 WebMock.stub(:get, "http://example.com/?foo=bar&foo1=bar2")
+WebMock.stub(:get, "http://example.com/path?foo=bar&foo1=bar2")
 WebMock.stub(:post, "http://example.com/post")
   .with(body: "email=foobar", headers: {"Content-Type" => "application/x-www-form-urlencoded"})
   .to_return(body: "success")
@@ -40,6 +41,14 @@ describe "Mechanize HTTP test" do
     page.uri.to_s.should eq uri
   end
 
+  it "GET with query parameter with path" do
+    agent = Mechanize.new
+    uri = "http://example.com/path?foo=bar&foo1=bar2"
+    page = agent.get(uri)
+    page.code.should eq 200
+    page.uri.to_s.should eq uri
+  end
+
   it "simple POST" do
     agent = Mechanize.new
     query = {"email" => "foobar"}

src/mechanize/http/agent.cr

@@ -84,6 +84,7 @@ class Mechanize
                                body : String?) : ::HTTP::Client::Response?
         request_log(uri, method)
         path = uri.path
+        path += "?#{uri.query.not_nil!}" if uri.query
 
         case uri.scheme.not_nil!.downcase
         when "http", "https"