Get some nice Regexp which is agnostic about the seconds.

features/step_definitions/jekyll_steps.rb

@@ -170,7 +170,7 @@ Then /^the "(.*)" file should not exist$/ do |file|
 end
 
 Then /^I should see today's time in "(.*)"$/ do |file|
-  assert_match Regexp.new(Regexp.escape(Time.now.to_s)), File.open(file).readlines.join
+  assert_match Regexp.new(seconds_agnostic_time(Time.now)), File.open(file).readlines.join
 end
 
 Then /^I should see today's date in "(.*)"$/ do |file|

features/support/env.rb

@@ -40,5 +40,15 @@ def location(folder, direction)
   [before || '.', after || '.']
 end
 
+def seconds_agnostic_time(datetime = Time.now)
+  pieces = datetime.to_s.split(" ")
+  time = "#{pieces[1].split(':').first}:#{pieces[1].split(':')[1]}:\\d{2}"
+  [
+    Regexp.escape(pieces[0]),
+    time,
+    Regexp.escape(pieces.last)
+  ].join("\\ ")
+end
+
 # work around "invalid option: --format" cucumber bug (see #296)
 Test::Unit.run = true if RUBY_VERSION < '1.9'