Add description punctuation

exampleSite/content/blog/emoji-support.md

@@ -2,7 +2,7 @@
 author = "Hugo Authors"
 title = "Emoji Support"
 date = "2019-03-05"
-description = "Guide to emoji usage in Hugo"
+description = "Guide to emoji usage in Hugo."
 tags = [
     "emoji",
 ]

exampleSite/content/blog/math-typesetting.md

@@ -2,7 +2,7 @@
 author: Hugo Authors
 title: Math Typesetting
 date: 2019-03-08
-description: A brief guide to setup KaTeX
+description: A brief guide to setup KaTeX.
 math: true
 ---
 

exampleSite/content/blog/placeholder-text.md

@@ -2,7 +2,7 @@
 author = "Hugo Authors"
 title = "Placeholder Text"
 date = "2019-03-09"
-description = "Lorem Ipsum Dolor Si Amet"
+description = "Lorem Ipsum Dolor Si Amet."
 tags = [
     "markdown",
     "text",

exampleSite/content/blog/rich-content.md

@@ -2,7 +2,7 @@
 author = "Hugo Authors"
 title = "Rich Content"
 date = "2019-03-10"
-description = "A brief description of Hugo Shortcodes"
+description = "A brief description of Hugo Shortcodes."
 tags = [
     "shortcodes",
     "privacy",