Refactor MD038/no-space-in-code to produce smaller/simpler edits and address an additional scenario.

doc-build/md038.md

@@ -1,38 +1,44 @@
-This rule is triggered for code spans that have content with spaces next to the
-beginning or ending backticks:
+This rule is triggered for code spans containing content with unnecessary space
+next to the beginning or ending backticks:
 
 ```markdown
 `some text `
 
 ` some text`
+
+`   some text   `
 ```
 
-To fix this, remove any spaces at the beginning or ending:
+To fix this, remove the extra space characters from the beginning and ending:
 
 ```markdown
 `some text`
 ```
 
-Note: Code spans containing only spaces are allowed by the specification:
-
-```markdown
-` ` or `   `
-```
-
-Note: A single leading and trailing space is allowed by the specification and
-automatically trimmed by the parser (in order to allow for code spans that embed
-backticks):
+Note: A single leading *and* trailing space is allowed by the specification and
+trimmed by the parser to support code spans that begin or end with a backtick:
 
 ```markdown
 `` `backticks` ``
+
+`` backtick` ``
 ```
 
-Note: A single leading or trailing space is allowed if used to separate code
-span markers from an embedded backtick (though the space is not trimmed):
+Note: When single-space padding is present in the input, it will be preserved
+(even if unnecessary):
 
 ```markdown
-`` ` embedded backtick``
+` code `
 ```
 
-Rationale: Violations of this rule are usually unintentional and may lead to
+Note: Code spans containing only spaces are allowed by the specification and are
+also preserved:
+
+```markdown
+` `
+
+`   `
+```
+
+Rationale: Violations of this rule are usually unintentional and can lead to
 improperly-rendered content.