Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/build-string.md

@@ -0,0 +1,20 @@
+# build-string
+Builds a string from the arguments.
+
+## Usage
+```shell
+> build-string ...args {flags} 
+ ```
+
+## Parameters
+* ...args: all values to form into the string
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Builds a string from a string and a number, without spaces between them
+```shell
+> build-string 'foo' 3
+ ```
+