Fix format_diff_lines.pl triggering on deleted files

azure-pipelines/util/format_diff_lines.pl

@@ -35,6 +35,7 @@ sub push_changes {
 	}
 }
 
+# Extract ranges of added lines
 while (my $line = <STDIN>) {
 	if ($line =~ /^diff .* a\/(?<old_file>.*) b\/(?<new_file>.*)$/) {
 		# New file
@@ -43,6 +44,10 @@ while (my $line = <STDIN>) {
 	} elsif ($line =~ /^@@ -([0-9]+)(,([0-9]+))? \+(?<new_pos>[0-9]+)(,(?<new_len>[0-9]+))? @@/) {
 		my $new_len = $+{new_len};
 		$new_len = 1 if ($new_len eq "");
+        if ($new_len == 0) {
+          # Ignore hunks with no added lines
+          next;
+        }
 		push @hunks, [$+{new_pos}, $new_len];
 	}
 }

azure-pipelines/util/sample.cpp

@@ -1,28 +0,0 @@
-void foo() {
-int bar;
-}
-
-class Hi
-{
-	Hi(
-		) : a(a), b(b)
-	{
-	}
-	int a;
-	int b; int c; int d;
-}
-	;
-
-
-void goodFormatting()
-{
-	int a = 0;
-	int b;
-	int c;
-	int d;
-	if (a) {
-		while (true) {
-			b = 1;
-		}
-	}
-}