trust the baseline parser less

Be way more picky when unexpected lines show up, just to validate that we consume
what's known correctly even in the face of possibly changing input.

Author: Byron

gix-blame/tests/blame.rs

@@ -41,6 +41,8 @@ mod baseline {
 
                     if skip_lines == 0 {
                         break;
+                    } else {
+                        continue;
                     }
                 }
 
@@ -69,6 +71,24 @@ mod baseline {
                         (line_number_in_final_file - 1)..(line_number_in_final_file + number_of_lines_in_group - 1);
                     assert!(ranges.is_none(), "should not overwrite existing ranges");
                     ranges = Some((blame_range, original_range));
+                } else if ![
+                    "author",
+                    "author-mail",
+                    "author-time",
+                    "author-tz",
+                    "committer",
+                    "committer-mail",
+                    "committer-time",
+                    "committer-tz",
+                    "summary",
+                    "previous",
+                    "filename",
+                    "boundary",
+                ]
+                .contains(&fields[0])
+                    && ObjectId::from_hex(fields[0].as_bytes()).is_err()
+                {
+                    panic!("unexpected line: '{:?}'", line.as_bstr());
                 }
             }