Fix typos

No changes to production code.

A typo in changelog is being excluded because it is a generated file

Found with `codespell`

spec/lib/annotate_rb/model_annotator/model_class_getter_spec.rb

@@ -121,7 +121,7 @@ class FooWithKnownMacro < ActiveRecord::Base
       end
     end
 
-    context "when the file includes invlaid multibyte chars (USASCII)" do
+    context "when the file includes invalid multibyte chars (USASCII)" do
       context 'when class FooWithUtf8 is defined in "foo_with_utf8.rb"' do
         let :filename do
           "foo_with_utf8.rb"

spec/lib/annotate_rb/model_annotator/model_wrapper_spec.rb

@@ -57,15 +57,15 @@
       context "with options[:format_rdoc]" do
         let!(:format_rdoc_option) { true }
 
-        it "should return the max width ncluding the length of the comments and the length of the rdoc" do
+        it "should return the max width including the length of the comments and the length of the rdoc" do
           is_expected.to eq(expect_length)
         end
       end
 
       context "with options[:format_rdoc] is false" do
         let!(:format_rdoc_option) { false }
 
-        it "should return the max width ncluding the length of the comments" do
+        it "should return the max width including the length of the comments" do
           is_expected.to eq(expect_length)
         end
       end
@@ -85,7 +85,7 @@
       context "with options[:format_rdoc]" do
         let!(:format_rdoc_option) { true }
 
-        it "should return the max width ncluding the length of the rdoc" do
+        it "should return the max width including the length of the rdoc" do
           is_expected.to eq(expect_length)
         end
       end