Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/str-trim.md

@@ -0,0 +1,26 @@
+# str trim
+trims text
+
+## Usage
+```shell
+> str trim ...args {flags} 
+ ```
+
+## Parameters
+* ...args: optionally trim text by column paths
+
+## Flags
+* -h, --help: Display this help message
+* -c, --char <string>: character to trim (default: whitespace)
+
+## Examples
+  Trim whitespace
+```shell
+> echo 'Nu shell ' | str trim
+ ```
+
+  Trim a specific character
+```shell
+> echo '=== Nu shell ===' | str trim -c '=' | str trim
+ ```
+