Add additional specs for Section support

ee/spec/fixtures/mixed_case_sectional_codeowners_example

@@ -53,3 +53,11 @@ model/db   @gl-database
 
 [dOcUmEnTaTiOn]
 README.md  @gl-docs
+
+[Two Words]
+README.md  @gl-database
+model/db   @gl-database
+
+[Double::Colon]
+README.md  @gl-database
+model/db   @gl-database

ee/spec/fixtures/sectional_codeowners_example

@@ -53,3 +53,11 @@ model/db   @gl-database
 
 [Documentation]
 README.md  @gl-docs
+
+[Two Words]
+README.md  @gl-database
+model/db   @gl-database
+
+[Double::Colon]
+README.md  @gl-database
+model/db   @gl-database

ee/spec/lib/gitlab/code_owners/file_spec.rb

@@ -63,8 +63,14 @@ RSpec.describe Gitlab::CodeOwners::File do
         it "is a hash sorted by sections without duplicates" do
           data = file.parsed_data
 
-          expect(data.keys.length).to eq(3)
-          expect(data.keys).to contain_exactly("codeowners", "Documentation", "Database")
+          expect(data.keys.length).to eq(5)
+          expect(data.keys).to contain_exactly(
+            "codeowners",
+            "Documentation",
+            "Database",
+            "Two Words",
+            "Double::Colon"
+          )
         end
 
         codeowners_section_paths = [
@@ -84,6 +90,8 @@ RSpec.describe Gitlab::CodeOwners::File do
           "codeowners"    | codeowners_section_paths | codeowners_section_owners
           "Documentation" | ["/**/README.md", "/**/ee/docs", "/**/docs"] | ["@gl-docs"]
           "Database"      | ["/**/README.md", "/**/model/db"] | ["@gl-database"]
+          "Two Words"     | ["/**/README.md", "/**/model/db"] | ["@gl-database"]
+          "Double::Colon" | ["/**/README.md", "/**/model/db"] | ["@gl-database"]
         end
 
         with_them do

ee/spec/services/ee/merge_requests/refresh_service_spec.rb

@@ -125,7 +125,7 @@ RSpec.describe MergeRequests::RefreshService do
           end
 
           it_behaves_like 'creates an approval rule based on current diff' do
-            let(:approval_rules_size) { 5 }
+            let(:approval_rules_size) { 7 }
           end
         end
       end