.gitattributes: Ensure only the toplevel occurrences of the selected files have their given attributes

Author: kit-ty-kate

.gitattributes

@@ -2,12 +2,12 @@
 * text=auto
 
 # Quoted strings with newlines
-testsuite/internal.ml text eol=lf
+/testsuite/internal.ml text eol=lf
 *.sh text eol=lf
 
 # The use of symbolic links in some examples/ directories
 # is problematic on Windows, see
 #   https://github.com/ocaml/ocamlbuild/pull/362
 # Exclude these files from release archives.
-examples export-ignore
-samples export-ignore
+/examples export-ignore
+/samples export-ignore