update comments about subdirectories

Signed-off-by: Ahmad Rezaii <[email protected]>

util/cron/nightly

@@ -411,7 +411,10 @@ if ($testblog == 1) {
     }
 
     # copy the relevant blog source files into the test directory so they'll be
-    # ran alongside all the other tests
+    # ran alongside all the other tests and the results will truncate $CHPL_HOME
+    # from the test file paths when reporting errors. Copying specific subdirectories
+    # this way avoids a bunch of skipped directories and the problem of testing
+    # the archetypes blog directory.
     mysystem("mkdir -p $testdir/copied-chapel-blog/content", "making chpl-src directory", $exitOnError, 1);
     mysystem("cp -r $blogdir/chpl-src $testdir/copied-chapel-blog/", "copying chapel-blog/chpl-src", $exitOnError, 1);
     mysystem("cp -r $blogdir/scripts $testdir/copied-chapel-blog/", "copying chapel-blog/scripts", $exitOnError, 1);
@@ -631,8 +634,6 @@ if ($examples == 1) {
 }
 
 if ($blogonly == 1 || ($testblog == 1 && $examples == 1)) {
-    # test the sub-directories explicitly to avoid a bunch of skipped directories,
-    # and also avoid the problem of testing the archetypes directory
     $testdirs .= " $testdir/copied-chapel-blog/";
 }