Update shacl12-inf-rules/index.html

Co-authored-by: David Habgood <[email protected]>

Author: afs

shacl12-inf-rules/index.html

@@ -821,7 +821,7 @@ <h3>Well-formedness Conditions</h3>
             Well-formedness is a set of conditions on the abstract syntax of
             shapes rules.  Together, these rules ensure that a [=variable=] in the
             [=head=] of a rule has a value defined in the [=body=] of the rule; 
-            that each variable in an condition expression or assignment 
+            that each variable in a condition expression or assignment 
             expression has a value at the point of evaluation; and that each
             assignment in a rule introduces a new variable, 
             not used earlier in the rule body.