Fix markdown lint errors

Features.md

@@ -1,4 +1,4 @@
-<!-- markdownlint-disable-next-line MD041 -->
+<!-- markdownlint-disable-next-line first-line-h1 -->
 ##### Project
 
 ::PROJECT-NAME
@@ -20,23 +20,23 @@
 
 **Process impact:** This is a set of detailed feature descriptions.
 
-*TODO: For each feature listed in the [feature set](Feature-Set),
+_TODO: For each feature listed in the [feature set](Feature-Set),
 give a detailed description of the feature here. Describe each feature
 in enough detail that it could be implemented by any member of the
 development team (not only someone who already informally knows what to
-do).*
+do)._
 
-*TIP: Start with a short textual description of each feature. Then, add
+_TIP: Start with a short textual description of each feature. Then, add
 more formal information as needed to make each description precise and
-unambiguous. E.g.,*
+unambiguous. E.g.,_
 
-- *Precisely define valid inputs, and error handling*
-- *Specify data structures with UML or logical schema*
-- *Specify UI aspects of features with tiny mock-ups*
-- *Specify key decisions with decision trees or tables*
-- *Specify key algorithms with pseudo-code or flow charts*
-- *Specify state-based behavior with state machines or tables*
-- *Specify sequences of events with scenario diagrams*
+- _Precisely define valid inputs, and error handling_
+- _Specify data structures with UML or logical schema_
+- _Specify UI aspects of features with tiny mock-ups_
+- _Specify key decisions with decision trees or tables_
+- _Specify key algorithms with pseudo-code or flow charts_
+- _Specify state-based behavior with state machines or tables_
+- _Specify sequences of events with scenario diagrams_
 
 ---
 
@@ -116,7 +116,7 @@ Functional area(s): ::WORD, WORD, WORD
 Use case(s): ::[UC-01](Use-Cases#UC-01)
 
 Description:
-::  1-4 PARAGRAPHS. USE BULLETS OR TABLES TO ORGANIZE INFORMATION. LINK TO WORKSHEETS OR ADDITIONAL INFORMATION.
+:: 1-4 PARAGRAPHS. USE BULLETS OR TABLES TO ORGANIZE INFORMATION. LINK TO WORKSHEETS OR ADDITIONAL INFORMATION.
 
 Precise Details: