add start date, finish sentence in abstract

writing_tools/writing_tools.poly.pm

@@ -2,6 +2,7 @@
 
 ◊title{Writing Tools}
 ◊author{George C. Privon}
+◊start-date{2020-05-13}
 
 ◊tags{writing, tools}
 ◊; from https://www.gwern.net/About#confidence-tags
@@ -19,7 +20,10 @@
 ◊(define (tool . parts)
   `(section ,@parts))
 
-◊abstract{Written communication is an important aspect }
+◊abstract{
+Written communication is an important aspect of work I do.
+So I care about the tools.
+}
 
 ◊tool{Rotring 600}