Render comment for FilePath::ReferencesParent() more precisely.

base/files/file_path.h

Index: base/files/file_path.h
diff --git a/base/files/file_path.h b/base/files/file_path.h
index 5410e0d686b2ca81f3dac90a4cef13bf3c248716..008b9f5afc67d83db10decbcc9447723da40fbdd 100644
--- a/base/files/file_path.h
+++ b/base/files/file_path.h
@@ -321,8 +321,8 @@ class BASE_EXPORT FilePath {
   // separator.
   FilePath StripTrailingSeparators() const WARN_UNUSED_RESULT;
 
-  // Returns true if this FilePath contains any attempt to reference a parent
-  // directory (i.e. has a path component that is ".."
+  // Returns true if this FilePath contains an attempt to reference a parent
+  // directory (e.g. has a path component that is "..").
   bool ReferencesParent() const;
 
   // Return a Unicode human-readable version of this path.