fix 1988/applin abstract

The `1988/applin` abstract was longer than 64 characters,
so we shortened the abstract.

1988/applin/.entry.json

@@ -6,7 +6,7 @@
     "dir" : "applin",
     "entry_id" : "1988_applin",
     "title" : "1988.applin",
-    "abstract" : "massive #define that includes itself and prints a table of primes",
+    "abstract" : "massive #define that includes itself and prints primes",
     "author_set" : [
         {
             "author_handle" : "Jack_Applin"