trim to 50 words instead of chars

Closes #1.

temp_index.py

@@ -12,6 +12,7 @@ from reportlab.pdfgen import canvas
 from reportlab.platypus import PageBreak, Paragraph, SimpleDocTemplate, Spacer
 
 CWD = Path().resolve()
+NUM_WORDS_COMMENT = 50
 
 from html.parser import HTMLParser
 from io import StringIO
@@ -64,12 +65,7 @@ def select_fields(fields, content, styles, book):
         content.append(Spacer(1, 12))
 
     if "comments" in fields:
-        comments = ", ".join(
-            [
-                shorten(comment.text, width=50, placeholder="...")
-                for comment in book.comments
-            ]
-        )
+        comments = " ".join([c.text for c in book.comments]).split()[:NUM_WORDS_COMMENT]
         tag = "<font size=10>{}</font>".format(comments)
         pcomments = Paragraph(strip_tags(tag))
         content.append(pcomments)