Fix `hub browse` help output when not in any repo

features/browse.feature

@@ -2,6 +2,11 @@ Feature: hub browse
   Background:
     Given I am "mislav" on github.com with OAuth token "OTOKEN"
 
+  Scenario: No repo
+    When I run `hub browse`
+    Then the exit status should be 1
+    Then the output should contain exactly "Usage: hub browse [<USER>/]<REPOSITORY>\n"
+
   Scenario: Project with owner
     When I successfully run `hub browse mislav/dotfiles`
     Then there should be no output

lib/hub/commands.rb

@@ -690,7 +690,7 @@ module Hub
         elsif subpage && !%w[commits tree blob settings].include?(subpage)
           branch = master_branch
           project = local_repo.main_project
-        else
+        elsif local_repo(false)
           # $ hub browse
           prefer_upstream = current_branch && current_branch.master?
           branch, project = remote_branch_and_project(method(:github_user), prefer_upstream)