fix: Drop a trailing negation from a comment

Author: bor-p-s

test/expect_build_failure/nested_bazel.sh

@@ -92,8 +92,8 @@ _nested_bazel_symlink_prefix=""
 # inner `bazel --batch` waits for the lock rather than failing), which keeps
 # the extracted external repos warm and avoids multiplying ~1GB of Scala jars
 # across a separate output base per test. `expect_build_failure.sh` splits its
-# tests across 3 such names (see its --lane), so this lock only pairs up two
-# tests that land in the same lane, not the whole test class.
+# tests across 3 such names (see its --lane), scoping this lock to the pair
+# of tests that happen to land in the same lane.
 _nested_bazel_home_hint() {
   if [[ -n "${RULES_SCALA_NESTED_BAZEL_USE_REAL_HOME:-}" ]]; then
     return