tweak error wording slightly

src/validate/js/propValidators/computed.ts

@@ -34,14 +34,14 @@ export default function computed(validator: Validator, prop: Node) {
 		walkThroughTopFunctionScope(body, (node: Node) => {
 			if (isThisGetCallExpression(node) && !node.callee.property.computed) {
 				validator.error(
-					`Cannot use this.get(...) — it must be passed into the computed function as an argument`,
+					`Cannot use this.get(...) — values must be passed into the function as arguments`,
 					node.start
 				);
 			}
 
 			if (node.type === 'ThisExpression') {
 				validator.error(
-					`Computed should be pure functions — they do not have access to the component instance and cannot use 'this'. Did you mean to put this in 'methods'?`,
+					`Computed properties should be pure functions — they do not have access to the component instance and cannot use 'this'. Did you mean to put this in 'methods'?`,
 					node.start
 				);
 			}

src/validate/js/propValidators/helpers.ts

@@ -25,7 +25,7 @@ export default function helpers(validator: Validator, prop: Node) {
 		walkThroughTopFunctionScope(prop.value.body, (node: Node) => {
 			if (isThisGetCallExpression(node) && !node.callee.property.computed) {
 				validator.error(
-					`Cannot use this.get(...) — it must be passed into the helper function as an argument`,
+					`Cannot use this.get(...) — values must be passed into the helper function as arguments`,
 					node.start
 				);
 			}

test/validator/samples/computed-purify-check-no-this/errors.json

@@ -1,8 +0,0 @@
-[{
-  "message": "Computed should be pure functions — they do not have access to the component instance and cannot use 'this'. Did you mean to put this in 'methods'?",
-  "pos": 83,
-  "loc": {
-    "line": 7,
-    "column": 4
-  }
-}]

test/validator/samples/computed-purify-check-this-get/errors.json

@@ -1,8 +0,0 @@
-[{
-  "message": "Cannot use this.get(...) — it must be passed into the computed function as an argument",
-  "pos": 73,
-  "loc": {
-    "line": 7,
-    "column": 11
-  }
-}]

test/validator/samples/computed-purity-check-no-this/errors.json

@@ -0,0 +1,8 @@
+[{
+	"message": "Computed properties should be pure functions — they do not have access to the component instance and cannot use 'this'. Did you mean to put this in 'methods'?",
+	"pos": 83,
+	"loc": {
+		"line": 7,
+		"column": 4
+	}
+}]

test/validator/samples/computed-purity-check-this-get/errors.json

@@ -0,0 +1,8 @@
+[{
+	"message": "Cannot use this.get(...) — values must be passed into the function as arguments",
+	"pos": 73,
+	"loc": {
+		"line": 7,
+		"column": 11
+	}
+}]

test/validator/samples/helper-purity-check-this-get/errors.json

@@ -1,5 +1,5 @@
 [{
-	"message": "Cannot use this.get(...) — it must be passed into the helper function as an argument",
+	"message": "Cannot use this.get(...) — values must be passed into the helper function as arguments",
 	"pos": 74,
 	"loc": {
 		"line": 7,