Tweak formatting & wording of `libreoffice`

sheets/libreoffice

@@ -1,9 +1,11 @@
-# Convert documents to PDF
+# libreoffice
+# Office productivity suite
+
+# Convert documents to PDF.
 libreoffice --headless --convert-to pdf *.pptx
 
-# Save them to a different directory?
+# Save PDFs to a different directory?
 libreoffice --headless --convert-to pdf *.docx --outdir ~/docs/
 
-# Convert files nested inside folders?
-# This uses sharkdp/fd, you could use GNU find, xargs etc.
+# Convert files nested inside folders? Uses sharkdp/fd, IE: find(1) & xargs(1).
 fd -e doc -e docx -x libreoffice --headless --convert-to pdf --outdir {//} {}