RULEAPI-791 LaYC: add "External coding guidelines" subtitle in the "Resources" section (#2454)

docs/description.adoc

@@ -59,6 +59,7 @@ This format is defined as follows:
 ** Articles & blog posts
 ** Conference presentations
 ** Standards
+** External coding guidelines
 ** Benchmarks
 ** Related rules
 
@@ -118,6 +119,7 @@ Goal: Allow the user to dig deeper by providing a curated list of resources.
 ** *Articles & blog posts* (level 3 title) [Optional]
 ** *Conference presentations* (level 3 title) [Optional]
 ** *Standards* (level 3 title) [Optional]
+** *External coding guidelines* (level 3 title) [Optional]
 ** *Benchmarks* (level 3 title) [Optional]
 ** *Related rules* (level 3 title) [Optional]
 +

rspec-tools/rspec_template/multi_language/language_specific/rule.adoc

@@ -40,4 +40,5 @@ FIXME
 //=== Articles & blog posts
 //=== Conference presentations
 //=== Standards
+//=== External coding guidelines
 //=== Benchmarks

rspec-tools/rspec_template/single_language/language_specific/rule.adoc

@@ -40,4 +40,5 @@ FIXME
 //=== Articles & blog posts
 //=== Conference presentations
 //=== Standards
+//=== External coding guidelines
 //=== Benchmarks

rspec-tools/rspec_tools/validation/description.py

@@ -34,7 +34,7 @@ MANDATORY_SECTIONS = ['Why is this an issue?']
 OPTIONAL_SECTIONS = {
   # Also covers 'How to fix it in {Framework Display Name}'
   'How to fix it': ['Code examples', 'How does this work?', 'Pitfalls', 'Going the extra mile'],
-  'Resources': ['Documentation', 'Articles & blog posts', 'Conference presentations', 'Standards', 'Benchmarks', 'Related rules']
+  'Resources': ['Documentation', 'Articles & blog posts', 'Conference presentations', 'Standards', 'External coding guidelines', 'Benchmarks', 'Related rules']
 }
 SUBSECTIONS = {
   'Code examples': ['Noncompliant code example', 'Compliant solution']