Update doc template for commands (#515)

Author: hustcer

book/commands/_agg.md

@@ -5,14 +5,9 @@ usage: |
   Performs a series of aggregations from a group by
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_all-false.md

@@ -5,14 +5,9 @@ usage: |
   Returns true if all values are false
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_all-true.md

@@ -5,14 +5,9 @@ usage: |
   Returns true if all values are true
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_append.md

@@ -5,14 +5,9 @@ usage: |
   Appends a new dataframe
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_arg-max.md

@@ -5,14 +5,9 @@ usage: |
   Return index for max value in series
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_arg-min.md

@@ -5,14 +5,9 @@ usage: |
   Return index for min value in series
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_arg-sort.md

@@ -5,14 +5,9 @@ usage: |
   Returns indexes for a sorted series
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_arg-true.md

@@ -5,14 +5,9 @@ usage: |
   Returns indexes where values are true
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_arg-unique.md

@@ -5,14 +5,9 @@ usage: |
   Returns indexes for unique values
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature
 

book/commands/_as-date.md

@@ -5,14 +5,9 @@ usage: |
   Converts string to date.
 ---
 
-<script>
-  import { usePageFrontmatter } from '@vuepress/client';
-  export default { computed: { frontmatter() { return usePageFrontmatter().value; } } }
-</script>
+# <code>{{ $frontmatter.title }}</code>
 
-# <code>{{ frontmatter.title }}</code>
-
-<div style='white-space: pre-wrap;'>{{ frontmatter.usage }}</div>
+<div style='white-space: pre-wrap;'>{{ $frontmatter.usage }}</div>
 
 ## Signature