Improve error message for damaged CHECK line

CodaFi · CodaFi · commit 6c951376b433 · 2017-11-20T13:05:41.000-05:00
diff --git a/Sources/FileCheck/CheckString.swift b/Sources/FileCheck/CheckString.swift
@@ -329,7 +329,7 @@ private func diagnoseFailedCheck(
   } else {
     diagnose(.error,
              at: loc,
-             with: prefix + ": could not find '\(pattern.fixedString)' in input",
+             with: prefix + ": could not find match for CHECK line",
       options: options
     )
   }

Original file line number	Diff line number	Diff line change
`@@ -329,7 +329,7 @@ private func diagnoseFailedCheck(`
`329`	`329`	`} else {`
`330`	`330`	`diagnose(.error,`
`331`	`331`	`at: loc,`
`332`		`- with: prefix + ": could not find '\(pattern.fixedString)' in input",`
	`332`	`+ with: prefix + ": could not find match for CHECK line",`
`333`	`333`	`options: options`
`334`	`334`	`)`
`335`	`335`	`}`