Update contributor_docs/p5.strands.md

Co-authored-by: Perminder Singh <[email protected]>

Author: davepagurek

contributor_docs/p5.strands.md

@@ -68,7 +68,7 @@ return b;
 // End chunk 3
 ```
 
-We store the individual states that variables can be in as nodes in a **directed acyclic graph (DAG)**. This is a fancy name that basically means each of these variable states may depend on previous varible states, and outputs can't feed back into inputs. Each time you modify a variable, that represents a new state of that variable. For example, below, it is not sufficient to know that `c` depends on `a` and `b`; you also need to know *which version of `b`* it branched off from:
+We store the individual states that variables can be in as nodes in a **directed acyclic graph (DAG)**. This is a fancy name that basically means each of these variable states may depend on previous variable states, and outputs can't feed back into inputs. Each time you modify a variable, that represents a new state of that variable. For example, below, it is not sufficient to know that `c` depends on `a` and `b`; you also need to know *which version of `b`* it branched off from:
 
 ```js
 let a = 0;