Reimplement LineLinter::isLinterSuppressed with the help of File::lin…

…tMarkers

src/Linters/LineLinter.hack

@@ -37,7 +37,7 @@ abstract class LineLinter<+Terror as LineLintError> extends SingleRuleLinter {
       }
 
       // We got an error. Let's check the previous line to see if it is marked as ignorable
-      if ($ln - 1 >= 0 && $this->isLinterSuppressed($lines[$ln - 1])) {
+      if ($ln - 1 >= 0 && $this->isLinterSuppressed($ln)) {
         continue;
       }
 
@@ -49,9 +49,13 @@ abstract class LineLinter<+Terror as LineLintError> extends SingleRuleLinter {
 
   /** Check if this linter has been disabled by a comment on the previous line.
    */
-  protected function isLinterSuppressed(string $previous_line): bool {
-    return Str\contains($previous_line, $this->getFixmeMarker()) ||
-      Str\contains($previous_line, $this->getIgnoreSingleErrorMarker());
+  private function isLinterSuppressed(int $base1_line_number): bool {
+    $line_marker = $this->getFile()->lintMarkers();
+    return (
+      $line_marker[$this->getFixmeMarker()][$base1_line_number] ??
+      $line_marker[$this->getIgnoreSingleErrorMarker()][$base1_line_number] ??
+      null
+    ) is nonnull;
   }
 
   /** Parse a single line of code and attempts to find lint errors */