API Doctor incorrectly parses tables as enumeration tables and fails validation

[jasonjoh]

This seems to be an issue with the code that tries to guess a table "shape" from the section title the table is in.

For example, this topic: https://learn.microsoft.com/en-us/graph/api/group-list-members?view=graph-rest-1.0&tabs=http.

The H1 in this topic is "List group members". If you add a table in the introduction (which we are doing as part of an effort to put national cloud support into the docs), the table gets parsed as an enumeration table in FindDecoderFromHeaderText.

Sequence of events:

• lastHeaderText is List group members
• this.CommonHeaderContentMap[4] has a key with the value {x} members
• The else if (kvp.Key.Contains("{x}")) clause is satisifed
• commonHeaderContent then becomes members
• lastHeader.EndsWith(commonHeaderContent) then becomes true
• Code thinks that List is a type since it's the word right before members
• Validation error: Failed to parse enumeration values for type microsoft.graph.list. Table requires a column header named one of the following: Member, Name, Value