docs: Add basic documentation for //for

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Starbeamrainbowlabs 2021-12-31 13:10:40 +00:00
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@ -1131,6 +1131,23 @@ Any suggestions on how to provide more customisability without making this comm
//noiseapply2d 0.4 3 layers dirt_with_snow dirt 3 stone 10
```
### `//for <value1> <value2> <value3>... do //<command> <arg> %% <arg>`
For a given list of values, executes the specified command for each value, replacing `%%` with each value. Implementation thanks to @VorTechnix.
To better illustrate what happens, consider the following command:
```
//for dirt stone glass do //replacemix air 10 %%
```
This is equivalent to executing the following 3 commands in sequence:
```
//replacemix air 10 dirt
//replacemix air 10 stone
//replacemix air 10 glass
```
## Extras