These 6 files had multiple examples all separated by a single newline.
While rendering it in markdown, the examples all come up in a single
line.
Adding another newline makes rendering better.
Also will help in easier copying (double click on the line to copy).
Fixes#310
Some files had no newlines, some had 1 newline and some more than 1 newline.
Normalize them all to have only 1 newline at the end of all files.
