Update control_flow.md (nushell#1313)

* Update control_flow.md Some commas for better understanding * tweak words --------- Co-authored-by: Darren Schroeder <[email protected]>
intellild · Mar 25, 2024 · bcf2a60 · bcf2a60
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diff --git a/book/control_flow.md b/book/control_flow.md
@@ -80,7 +80,7 @@ The branches can either return a single value or, as shown in the second branch,
 
 #### Catch all branch
 
-You can have also have a catch all condition for if the given value doesn't match any of the other conditions by having a branch whose matching value is `_`.
+You can also have a catch all condition for when the given value doesn't match any of the other conditions by having a branch whose matching value is `_`.
 
 ```nu
 > let foo = match 7 {