Treat remote URL user name case insensitive when creating PR

See https://github.com/github/hub/issues/685

features/pull_request.feature

@@ -513,6 +513,22 @@ Feature: hub pull-request
     When I successfully run `hub pull-request -m hereyougo`
     Then the output should contain exactly "the://url\n"
 
+  Scenario: Create pull request from branch on the personal fork case sensitive
+    Given the "origin" remote has url "git://github.com/github/coral.git"
+    And the "doge" remote has url "git://github.com/Mislav/coral.git"
+    And I am on the "feature" branch pushed to "doge/feature"
+    Given the GitHub API server:
+      """
+      post('/repos/github/coral/pulls') {
+        assert :base  => 'master',
+               :head  => 'Mislav:feature',
+               :title => 'hereyougo'
+        json :html_url => "the://url"
+      }
+      """
+    When I successfully run `hub pull-request -m hereyougo`
+    Then the output should contain exactly "the://url\n"
+
   Scenario: Create pull request from branch on the personal fork
     Given the "origin" remote has url "git://github.com/github/coral.git"
     And the "doge" remote has url "git://github.com/mislav/coral.git"

github/localrepo.go

@@ -2,6 +2,7 @@ package github
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/github/hub/git"
 )
@@ -55,7 +56,7 @@ func (r *GitHubRepo) remotesForPublish(owner string) (remotes []Remote) {
 	if owner != "" {
 		for _, remote := range r.remotes {
 			p, e := remote.Project()
-			if e == nil && p.Owner == owner {
+			if e == nil && strings.ToLower(p.Owner) == owner {
 				remotesMap[remote.Name] = remote
 			}
 		}

github/localrepo_test.go

@@ -1,6 +1,7 @@
 package github
 
 import (
+	"net/url"
 	"testing"
 
 	"github.com/bmizerany/assert"
@@ -16,3 +17,19 @@ func TestGitHubRepo_OriginRemote(t *testing.T) {
 	assert.Equal(t, "origin", gitRemote.Name)
 	assert.Equal(t, repo.Remote, gitRemote.URL.String())
 }
+
+func TestGitHubRepo_remotesForPublish(t *testing.T) {
+	url, _ := url.Parse("ssh://git@github.com/Owner/repo.git")
+	remotes := []Remote{
+		{
+			Name: "Owner",
+			URL:  url,
+		},
+	}
+	repo := GitHubRepo{remotes}
+	remotesForPublish := repo.remotesForPublish("owner")
+
+	assert.Equal(t, 1, len(remotesForPublish))
+	assert.Equal(t, "Owner", remotesForPublish[0].Name)
+	assert.Equal(t, url.String(), remotesForPublish[0].URL.String())
+}