Fix Active Record validation error messages markup in guides

The other way it was not marking the text as italic, it was showing the
underlines as normal text.

Also fixes some code examples indentation and # => marks in Active Model
and Active Record guides.

[ci skip]

1 files changed, 18 insertions, 18 deletions

diff --git a/guides/source/active_model_basics.md b/guides/source/active_model_basics.md
index 0de40cea7e..68ac26c681 100644
--- a/guides/source/active_model_basics.md
+++ b/guides/source/active_model_basics.md
@@ -85,9 +85,9 @@ class Person
 end
 
 person = Person.new
-person.to_model == person  #=> true
-person.to_key              #=> nil
-person.to_param            #=> nil
+person.to_model == person  # => true
+person.to_key              # => nil
+person.to_param            # => nil
 ```
 
 ### Dirty
@@ -130,22 +130,22 @@ end
 
 ```ruby
 person = Person.new
-person.changed? #=> false
+person.changed? # => false
 
 person.first_name = "First Name"
-person.first_name #=> "First Name"
+person.first_name # => "First Name"
 
 # returns if any attribute has changed.
-person.changed? #=> true
+person.changed? # => true
 
 # returns a list of attributes that have changed before saving.
-person.changed #=> ["first_name"]
+person.changed # => ["first_name"]
 
 # returns a hash of the attributes that have changed with their original values.
-person.changed_attributes #=> {"first_name"=>nil}
+person.changed_attributes # => {"first_name"=>nil}
 
 # returns a hash of changes, with the attribute names as the keys, and the values will be an array of the old and new value for that field.
-person.changes #=> {"first_name"=>[nil, "First Name"]}
+person.changes # => {"first_name"=>[nil, "First Name"]}
 ```
 
 #### Attribute based accessor methods
@@ -154,23 +154,23 @@ Track whether the particular attribute has been changed or not.
 
 ```ruby
 # attr_name_changed?
-person.first_name #=> "First Name"
-person.first_name_changed? #=> true
+person.first_name # => "First Name"
+person.first_name_changed? # => true
 ```
 
 Track what was the previous value of the attribute.
 
 ```ruby
 # attr_name_was accessor
-person.first_name_was  #=> "First Name"
+person.first_name_was # => "First Name"
 ```
 
 Track both previous and current value of the changed attribute. Returns an array if changed, else returns nil.
 
 ```ruby
 # attr_name_change
-person.first_name_change #=> [nil, "First Name"]
-person.last_name_change #=> nil
+person.first_name_change # => [nil, "First Name"]
+person.last_name_change # => nil
 ```
 
 ### Validations
@@ -189,12 +189,12 @@ class Person
 end
 
 person = Person.new(token: "2b1f325")
-person.valid?                        #=> false
+person.valid?                        # => false
 person.name = 'vishnu'
 person.email = 'me'
-person.valid?                        #=> false
+person.valid?                        # => false
 person.email = 'me@vishnuatrai.com'
-person.valid?                        #=> true
+person.valid?                        # => true
 person.token = nil
-person.valid?                        #=> raises ActiveModel::StrictValidationFailed
+person.valid?                        # => raises ActiveModel::StrictValidationFailed
 ```