fix: don't error on continuation characters

Author: jdkato

internal/lint/util.go

@@ -36,7 +36,8 @@ func findBestLineBySubstring(s, sub string) (int, string) {
 }
 
 func findLineBySubstring(s, sub string, seen map[string]int) (int, string) {
-	if strings.Count(sub, "\n") > 0 {
+	lines := strings.Count(sub, "\n")
+	if lines > 0 {
 		sub = strings.Split(sub, "\n")[0]
 	}
 
@@ -48,6 +49,21 @@ func findLineBySubstring(s, sub string, seen map[string]int) (int, string) {
 		}
 	}
 
+	if lines <= 0 {
+		// Special case: check for substrings.
+		//
+		// See #1018.
+		for _, part := range strings.Split(sub, " ") {
+			for i, line := range strings.Split(s, "\n") {
+				if strings.Contains(line, part) {
+					if j, ok := seen[line]; !ok || j-1 != i {
+						return i + 1, line
+					}
+				}
+			}
+		}
+	}
+
 	return -1, ""
 }
 

testdata/fixtures/views/.vale.ini

@@ -25,3 +25,6 @@ View = Petstore
 
 [Rule.yml]
 View = Vale
+
+[newline.yml]
+View = NewLine

testdata/fixtures/views/newline.yml

@@ -0,0 +1,4 @@
+openapi: 3.0.1
+info:
+  description: "Line 1\
+    \ Line 2"

testdata/styles/config/views/NewLine.yml

@@ -0,0 +1,5 @@
+engine: dasel
+scopes:
+  # API info
+  - expr: info.description
+    name: title