Fix a couple of bundler issues with keyword argument separation

There are more issues than this, but hopefully this is enough
to get make test-bundler passing in CI.

lib/bundler/vendor/thor/lib/thor.rb

@@ -90,9 +90,14 @@ class Bundler::Thor
     # ==== Parameters
     # Hash[String|Array => Symbol]:: Maps the string or the strings in the array to the given command.
     #
-    def map(mappings = nil)
+    def map(mappings = nil, **kw)
       @map ||= from_superclass(:map, {})
 
+      if mappings && !kw.empty?
+        mappings = kw.merge!(mappings)
+      else
+        mappings ||= kw
+      end
       if mappings
         mappings.each do |key, value|
           if key.respond_to?(:each)

spec/bundler/runtime/inline_spec.rb

@@ -88,9 +88,10 @@ RSpec.describe "bundler/inline#gemfile" do
     RUBY
 
     expect(out).to include("Installing activesupport")
-    err.gsub! %r{.*lib/sinatra/base\.rb:\d+: warning: constant ::Fixnum is deprecated$}, ""
-    err.strip!
-    expect(err).to be_empty
+    err.gsub! %r{(.*lib/sinatra/base\.rb:\d+: warning: constant ::Fixnum is deprecated$)}, ""
+    err_lines = err.split("\n")
+    err_lines.reject!{|line| line =~ /\.rb:\d+: warning: The last/}
+    expect(err_lines).to be_empty
     expect(exitstatus).to be_zero if exitstatus
   end