Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/with-env.md

@@ -1,36 +1,39 @@
-# with-env
+---
+title: with-env
+layout: command
+version: 0.59.0
+---
+
 Runs a block with an environment variable set.
 
-## Usage
-```shell
-> with-env <variable> <block> {flags} 
- ```
+## Signature
+
+```> with-env (variable) (block)```
 
 ## Parameters
-* `<variable>` the environment variable to temporarily set
-* `<block>` the block to run once the variable is set
 
-## Flags
-* -h, --help: Display this help message
+ -  `variable`: the environment variable to temporarily set
+ -  `block`: the block to run once the variable is set
 
 ## Examples
-  Set the MYENV environment variable
-```shell
-> with-env [MYENV "my env value"] { echo $nu.env.MYENV }
- ```
 
-  Set by primitive value list
+Set the MYENV environment variable
 ```shell
-> with-env [X Y W Z] { echo $nu.env.X $nu.env.W }
- ```
+> with-env [MYENV "my env value"] { $env.MYENV }
+```
 
-  Set by single row table
+Set by primitive value list
 ```shell
-> with-env [[X W]; [Y Z]] { echo $nu.env.X $nu.env.W }
- ```
+> with-env [X Y W Z] { $env.X }
+```
 
-  Set by row(e.g. `open x.json` or `from json`)
+Set by single row table
 ```shell
-> echo '{"X":"Y","W":"Z"}'|from json|with-env $it { echo $nu.env.X $nu.env.W }
- ```
+> with-env [[X W]; [Y Z]] { $env.W }
+```
+
+Set by row(e.g. `open x.json` or `from json`)
+```shell
+> echo '{"X":"Y","W":"Z"}'|from json|with-env $it { echo $env.X $env.W }
+```