Correct lib/.gitignore description

Author: jonpas

lib/.gitignore

@@ -1,6 +1,6 @@
 # Do not edit this file, it can/will be replaced by template updates.
-# All subdirectories are ignored by default. If you specifically want to enable
-# a subdirectory for commiting, add it as an exception _after_ the */** rule.
+# If you specifically want to enable a subdirectory for committing,
+# add it as an exception inside the subdirectory.
 
 # DO NOT REMOVE THESE LINES, ESPECIALLY DO NOT REMOVE IT WHILE COMMITTING
 third-party/