Document that glob() will traverse into hidden directories.
RELNOTES: None.
@@ -432,6 +432,11 @@ There are several important limitations and caveats:
with a compound pattern, your pattern needs to begin with a <code>.</code>. For example,
<code>*</code> and <code>.*.txt</code> will match <code>.foo.txt</code>, but <code>*.txt</code>
will not.
+
+ Hidden directories are also matched in the same manner. Hidden directories
+ may include files that are not required as inputs, and can increase the
+ number of unnecessarily globbed files and memory consumption. To exclude
+ hidden directories, add them to the "exclude" list argument.
</li>
<li>
