standardize CSS formatting for features code block
The first and last code blocks on this table had the Dark Code Theme button available, and they use a different font than the middle two blocks.
@@ -156,7 +156,7 @@ support and expansion. These are:
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- <td><code>implies = ['feature']</code>
+ <td><pre>implies = ['feature']</pre>
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<td><p>Feature-level. This feature implies the specified feature(s).
Enabling a feature also implicitly enables all features implied by it
@@ -167,7 +167,7 @@ support and expansion. These are:
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- <td><code>provides = ['feature']</code>
+ <td><pre>provides = ['feature']</pre>
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<td><p>Feature-level. Indicates that this feature is one of several mutually
exclusive alternate features. For example, all of the sanitizers could
