Fix several typos and spelling errors (#3529)

Discovered using codespell:
https://github.com/codespell-project/codespell

lib/rails_admin.rb

@@ -19,7 +19,7 @@ module RailsAdmin
   #
   # If only a block is passed it is stored to initializer stack to be evaluated
   # on first request in production mode and on each request in development. If
-  # initialization has already occured (in other words RailsAdmin.setup has
+  # initialization has already occurred (in other words RailsAdmin.setup has
   # been called) the block will be added to stack and evaluated at once.
   #
   # Otherwise returns RailsAdmin::Config class.

lib/rails_admin/adapters/mongoid/association.rb

@@ -122,7 +122,7 @@ def nested_options
           nested = nested_attributes_options.try { |o| o[name] }
           if !nested && %i[embeds_one embeds_many].include?(macro.to_sym) && !cyclic?
             raise <<~MSG
-              Embbeded association without accepts_nested_attributes_for can't be handled by RailsAdmin,
+              Embedded association without accepts_nested_attributes_for can't be handled by RailsAdmin,
               because embedded model doesn't have top-level access.
               Please add `accepts_nested_attributes_for :#{association.name}' line to `#{model}' model.
             MSG

lib/rails_admin/config/fields.rb

@@ -22,7 +22,7 @@ module Fields
 
       # Registry of field factories.
       #
-      # Field factory is an anonymous function that recieves the parent object,
+      # Field factory is an anonymous function that receives the parent object,
       # an array of field properties and an array of fields already instantiated.
       #
       # If the factory returns true then that property will not be run through

lib/rails_admin/config/fields/base.rb

@@ -353,7 +353,7 @@ def parse_value(value)
         end
 
         def parse_input(_params)
-          # overriden
+          # overridden
         end
 
         def inverse_of

lib/rails_admin/config/has_fields.rb

@@ -44,7 +44,7 @@ def configure(name, type = nil, &block)
         [*name].each { |field_name| field(field_name, type, false, &block) }
       end
 
-      # include fields by name and apply an optionnal block to each (through a call to fields),
+      # include fields by name and apply an optional block to each (through a call to fields),
       # or include fields by conditions if no field names
       def include_fields(*field_names, &block)
         if field_names.empty?

spec/integration/actions/edit_spec.rb

@@ -428,13 +428,13 @@ class HelpTest < Tableless
           field :name do
             read_only true
             formatted_value do
-              "I'm outputed in the form"
+              "I'm outputted in the form"
             end
           end
         end
       end
       visit new_path(model_name: 'team')
-      is_expected.to have_content("I'm outputed in the form")
+      is_expected.to have_content("I'm outputted in the form")
     end
 
     it 'is hideable' do

spec/rails_admin/adapters/mongoid/association_spec.rb

@@ -264,8 +264,8 @@ class MongoRecursivelyEmbedsMany
         recursively_embeds_many
       end
 
-      expect { RailsAdmin::AbstractModel.new(MongoEmbedsOne).associations.first.nested_options }.to raise_error(RuntimeError, "Embbeded association without accepts_nested_attributes_for can't be handled by RailsAdmin,\nbecause embedded model doesn't have top-level access.\nPlease add `accepts_nested_attributes_for :mongo_embedded' line to `MongoEmbedsOne' model.\n")
-      expect { RailsAdmin::AbstractModel.new(MongoEmbedsMany).associations.first.nested_options }.to raise_error(RuntimeError, "Embbeded association without accepts_nested_attributes_for can't be handled by RailsAdmin,\nbecause embedded model doesn't have top-level access.\nPlease add `accepts_nested_attributes_for :mongo_embeddeds' line to `MongoEmbedsMany' model.\n")
+      expect { RailsAdmin::AbstractModel.new(MongoEmbedsOne).associations.first.nested_options }.to raise_error(RuntimeError, "Embedded association without accepts_nested_attributes_for can't be handled by RailsAdmin,\nbecause embedded model doesn't have top-level access.\nPlease add `accepts_nested_attributes_for :mongo_embedded' line to `MongoEmbedsOne' model.\n")
+      expect { RailsAdmin::AbstractModel.new(MongoEmbedsMany).associations.first.nested_options }.to raise_error(RuntimeError, "Embedded association without accepts_nested_attributes_for can't be handled by RailsAdmin,\nbecause embedded model doesn't have top-level access.\nPlease add `accepts_nested_attributes_for :mongo_embeddeds' line to `MongoEmbedsMany' model.\n")
       expect { RailsAdmin::AbstractModel.new(MongoRecursivelyEmbedsOne).associations.first.nested_options }.not_to raise_error
       expect { RailsAdmin::AbstractModel.new(MongoRecursivelyEmbedsMany).associations.first.nested_options }.not_to raise_error
     end

spec/rails_admin/config/fields/base_spec.rb

@@ -63,8 +63,8 @@
         class ConditionalValidationTest < Tableless
           column :foo, :varchar
           column :bar, :varchar
-          validates :foo, presence: true, if: :presisted?
-          validates :bar, presence: true, unless: :presisted?
+          validates :foo, presence: true, if: :persisted?
+          validates :bar, presence: true, unless: :persisted?
         end
       end
 

spec/rails_admin/config/has_fields_spec.rb

@@ -83,7 +83,7 @@
       end
     end
 
-    it "does not cause FrozenError by changing exiting field's tye" do
+    it "does not cause FrozenError by changing exiting field's type" do
       # Reference the fields for readonly
       config.edit.send(:_fields, true)
 

spec/rails_admin/config_spec.rb

@@ -72,9 +72,9 @@
 
     it 'can be configured' do
       RailsAdmin.config do |config|
-        config.main_app_name = %w[stati c value]
+        config.main_app_name = %w[static value]
       end
-      expect(RailsAdmin.config.main_app_name).to eq(%w[stati c value])
+      expect(RailsAdmin.config.main_app_name).to eq(%w[static value])
     end
   end