do some typo fixing

guides/source/active_record_querying.md

@@ -1297,7 +1297,7 @@ recommended that you use the block form of `unscoped`:
 
 ```ruby
 Client.unscoped {
-  Client.created_before(Time.zome.now)
+  Client.created_before(Time.zone.now)
 }
 ```
 

guides/source/active_support_core_extensions.md

@@ -1344,7 +1344,7 @@ The second argument, `indent_string`, specifies which indent string to use. The
 "foo".indent(2, "\t")    # => "\t\tfoo"
 ```
 
-While `indent_string` is tipically one space or tab, it may be any string.
+While `indent_string` is typically one space or tab, it may be any string.
 
 The third argument, `indent_empty_lines`, is a flag that says whether empty lines should be indented. Default is false.
 

guides/source/active_support_instrumentation.md

@@ -273,7 +273,7 @@ Action Mailer
   to: ["users@rails.com", "ddh@rails.com"],
   from: ["me@rails.com"],
   date: Sat, 10 Mar 2012 14:18:09 +0100,
-  mail: "..." # ommitted for beverity
+  mail: "..." # omitted for brevity
 }
 ```
 
@@ -299,7 +299,7 @@ Action Mailer
   to: ["users@rails.com", "ddh@rails.com"],
   from: ["me@rails.com"],
   date: Sat, 10 Mar 2012 14:18:09 +0100,
-  mail: "..." # ommitted for beverity
+  mail: "..." # omitted for brevity
 }
 ```
 

guides/source/form_helpers.md

@@ -423,7 +423,7 @@ Whenever Rails sees that the internal value of an option being generated matches
 
 TIP: The second argument to `options_for_select` must be exactly equal to the desired internal value. In particular if the value is the integer 2 you cannot pass "2" to `options_for_select` — you must pass 2. Be aware of values extracted from the `params` hash as they are all strings.
 
-WARNING: when `:inlude_blank` or `:prompt:` are not present, `:include_blank` is forced true if the select attribute `required` is true, display `size` is one and `multiple` is not true.
+WARNING: when `:include_blank` or `:prompt:` are not present, `:include_blank` is forced true if the select attribute `required` is true, display `size` is one and `multiple` is not true.
 
 You can add arbitrary attributes to the options using hashes: