Fix some typos, including a global "seperator" -> "separator".

actionpack/lib/action_view/helpers/date_helper.rb

@@ -876,8 +876,8 @@ def input_id_from_type(type)
           input_name_from_type(type).gsub(/([\[\(])|(\]\[)/, '_').gsub(/[\]\)]/, '')
         end
 
-        # Given an ordering of datetime components, create the selection html
-        # and join them with their appropriate seperators
+        # Given an ordering of datetime components, create the selection HTML
+        # and join them with their appropriate separators.
         def build_selects_from_types(order)
           select = ''
           order.reverse.each do |type|

actionpack/lib/action_view/helpers/number_helper.rb

@@ -140,7 +140,7 @@ def number_to_percentage(number, options = {})
       #  number_with_delimiter(12345678)                        # => 12,345,678
       #  number_with_delimiter(12345678.05)                     # => 12,345,678.05
       #  number_with_delimiter(12345678, :delimiter => ".")     # => 12.345.678
-      #  number_with_delimiter(12345678, :seperator => ",")     # => 12,345,678
+      #  number_with_delimiter(12345678, :separator => ",")     # => 12,345,678
       #  number_with_delimiter(98765432.98, :delimiter => " ", :separator => ",")
       #  # => 98 765 432,98
       #

actionpack/lib/action_view/helpers/text_helper.rb

@@ -538,7 +538,7 @@ def auto_link_urls(text, html_options = {})
             punctuation = ''
             # detect already linked URLs
             if $` =~ /<a\s[^>]*href="$/
-              # do not change string; URL is alreay linked
+              # do not change string; URL is already linked
               href
             else
               # don't include trailing punctuation character as part of the URL

activesupport/lib/active_support/inflector.rb

@@ -258,9 +258,9 @@ def demodulize(class_name_in_module)
     #   # => <a href="/person/1-donald-e-knuth">Donald E. Knuth</a>
     def parameterize(string, sep = '-')
       re_sep = Regexp.escape(sep)
-      # replace accented chars with ther ascii equivalents
+      # Replace accented chars with their ASCII equivalents.
       parameterized_string = transliterate(string)
-      # Turn unwanted chars into the seperator
+      # Turn unwanted chars into the separator.
       parameterized_string.gsub!(/[^a-z0-9\-_\+]+/i, sep)
       # No more than one of the separator in a row.
       parameterized_string.squeeze!(sep)
@@ -270,7 +270,7 @@ def parameterize(string, sep = '-')
     end
 
 
-    # Replaces accented characters with their ascii equivalents.
+    # Replaces accented characters with their ASCII equivalents.
     def transliterate(string)
       Iconv.iconv('ascii//ignore//translit', 'utf-8', string).to_s
     end