Fix a few typo errors in docs (theme-next#864)

_config.yml

@@ -244,7 +244,7 @@ toc:
   wrap: false
   # If true, all level of TOC in a post will be displayed, rather than the activated part of it.
   expand_all: false
-  # Maximum heading depth of generated toc. You can set it in one post through `toc_max_depth` in Front Matter.
+  # Maximum heading depth of generated toc. You can set it in one post through `toc_max_depth` in Front-matter.
   max_depth: 6
 
 sidebar:
@@ -356,7 +356,7 @@ wechat_subscriber:
 # Reward (Donate)
 reward_settings:
   # If true, reward would be displayed in every article by default.
-  # You can show or hide reward in a specific article throuth `reward: true | false` in Front Matter.
+  # You can show or hide reward in a specific article throuth `reward: true | false` in Front-matter.
   enable: false
   animation: false
   #comment: Donate comment here
@@ -498,14 +498,14 @@ math:
   enable: false
 
   # Default (true) will load mathjax / katex script on demand.
-  # That is it only render those page which has `mathjax: true` in Front Matter.
+  # That is it only render those page which has `mathjax: true` in Front-matter.
   # If you set it to false, it will load mathjax / katex srcipt EVERY PAGE.
   per_page: true
 
   engine: mathjax
   #engine: katex
 
-  # hexo-rendering-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
+  # hexo-renderer-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
   mathjax:
     cdn: //cdn.jsdelivr.net/npm/mathjax@2/MathJax.js?config=TeX-AMS-MML_HTMLorMML
     #cdn: //cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js?config=TeX-MML-AM_CHTML
@@ -541,7 +541,7 @@ quicklink:
   enable: false
 
   # Quicklink (quicklink.umd.js script) is loaded on demand
-  # Add `quicklink: true` in Front Matter of the page or post you need
+  # Add `quicklink: true` in Front-matter of the page or post you need
   # Home page and archive page can be controlled through home and archive options below
   home: true
   archive: true

docs/MATH.md

@@ -198,14 +198,14 @@ math:
   enable: false
 
   # Default(true) will load mathjax/katex script on demand
-  # That is it only render those page who has 'mathjax: true' in Front Matter.
+  # That is it only render those page who has 'mathjax: true' in Front-matter.
   # If you set it to false, it will load mathjax/katex srcipt EVERY PAGE.
   per_page: true
 
   engine: mathjax
   #engine: katex
 
-  # hexo-rendering-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
+  # hexo-renderer-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
   mathjax:
     # For newMathJax CDN (cdnjs.cloudflare.com) with fallback to oldMathJax (cdn.mathjax.org).
     cdn: //cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML
@@ -235,7 +235,7 @@ This option is to control whether to render Math Equations every page.
 
 The behavior of default (`true`) is to render Math Equations **on demand**.
 
-It will only render those posts which have `mathjax: true` in their Front Matter.
+It will only render those posts which have `mathjax: true` in their Front-matter.
 
 For example:
 

docs/zh-CN/MATH.md

@@ -203,14 +203,14 @@ math:
   enable: false
 
   # Default(true) will load mathjax/katex script on demand
-  # That is it only render those page who has 'mathjax: true' in Front Matter.
+  # That is it only render those page who has 'mathjax: true' in Front-matter.
   # If you set it to false, it will load mathjax/katex srcipt EVERY PAGE.
   per_page: true
 
   engine: mathjax
   #engine: katex
 
-  # hexo-rendering-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
+  # hexo-renderer-pandoc (or hexo-renderer-kramed) needed to full MathJax support.
   mathjax:
     # Use 2.7.1 as default, jsdelivr as default CDN, works everywhere even in China
     cdn: //cdn.jsdelivr.net/npm/[email protected]/MathJax.js?config=TeX-AMS-MML_HTMLorMML
@@ -238,9 +238,9 @@ math:
 
 这个选项是控制是否在每篇文章都渲染数学公式；
 
-默认(`true`) 的行为是**只对 Front Matter 中含有 `mathjax: true` 的文章进行数学公式渲染**。
+默认(`true`) 的行为是**只对 Front-matter 中含有 `mathjax: true` 的文章进行数学公式渲染**。
 
-如果 Front Matter 中不含有 `mathjax: true`，或者 `mathjax: false`，那么 NexT 将不会对这些文章进行数学公式渲染。
+如果 Front-matter 中不含有 `mathjax: true`，或者 `mathjax: false`，那么 NexT 将不会对这些文章进行数学公式渲染。
 
 例如：