Fix missing semicolon in .d-contents nav a CSS rule

[soumyaray]

Problem

The .d-contents nav a rule in the article template is missing a semicolon after text-decoration: none, at inst/rmarkdown/templates/distill_article/resources/distill.html (line 289):

.d-contents nav a {
  font-size: 13px;
  border-bottom: none;
  text-decoration: none     /* <- missing semicolon at end of this line */
  color: rgba(0, 0, 0, 0.8);
}

Because the declaration isn't terminated, the CSS parser reads the value of text-decoration as none color: rgba(0, 0, 0, 0.8). That's an invalid value, so the parser discards the whole text-decoration declaration and consumes the color line into it — meaning table-of-contents links get neither the intended text-decoration: none nor the color: rgba(0, 0, 0, 0.8).

The effect is of course only cosmetic (TOC link color/underline fall back through the cascade).

It seems that the only malformed copy is in distill.html so its an easy fix.

Fix

Add the missing semicolon:

   border-bottom: none;
-  text-decoration: none
+  text-decoration: none;
   color: rgba(0, 0, 0, 0.8);