For all principles, enforce proper usage of quotes, ticks, backticks

[nataled]

Originally posted by @cmungall in #2668 (comment)

I recommend backticks over double quotes in markdown when referring to controlled terms, curies, etc

[nataled]

Note: We often use backticks for cases where we want to show how something should look in a file.
Note: Manchester syntax uses single quotes for term labels; perhaps we should follow that example.

list of different cases we need to consider:

• OBO Namespaces
• CURIEs
• term labels
• Requirement levels (MUST, SHOULD, etc)
• file names
• URLs, IRIs (all of which should be clickable?)
• (more to be added)