Adjust grammar for constraint eval for let spec for usnistgov#548

website/content/specification/syntax/constraints.md

@@ -200,7 +200,7 @@ A `let` statement has a REQUIRED `@var` flag, which defines the variable name.
 
 A `let` statement has a REQUIRED `@expression` flag, which defines an [Metapath expression](/specification/syntax/metapath), whose result is used to define the variable's value in the evaluation context.
 
-During constraint evaluation, each `let` statement MUST be evaluated in encounter order. If a previous variable is bound with the same name in the evaluation context, the new value MUST bound in a sub-context to avoid side effects. This sub-context MUST be made available to any constraints following the `let` statement declaration, and to any constraints defined on child nodes of the current context.
+During constraint evaluation, each `let` statement MUST be evaluated in encountered order. If a previous variable is bound with the same name in the evaluation context, the new value MUST bound in a sub-context to avoid side effects. This sub-context MUST be made available to any constraints following the `let` statement declaration, and to any constraints defined on child nodes of the current context.
 
 During evaluation, when a variable is bound for a `let` statement, the variables value MUST be set to the result of evaluating the `@expression` using the current node as the Metapath evaluation focus.