Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/for.md

@@ -0,0 +1,34 @@
+# for
+Run a block on each row of the table.
+
+## Usage
+```shell
+> for <var> <in> <value> <block> {flags} 
+ ```
+
+## Parameters
+* `<var>` the name of the variable
+* `<in>` the word 'in'
+* `<value>` the value we want to iterate
+* `<block>` the block to run on each item
+
+## Flags
+* -h, --help: Display this help message
+* -n, --numbered: returned a numbered item ($it.index and $it.item)
+
+## Examples
+  Echo the square of each integer
+```shell
+> for x in [1 2 3] { $x * $x }
+ ```
+
+  Work with elements of a range
+```shell
+> for $x in 1..3 { $x }
+ ```
+
+  Number each item and echo a message
+```shell
+> for $it in ['bob' 'fred'] --numbered { $"($it.index) is ($it.item)" }
+ ```
+