Sync final newlines

This patch adds some missing newlines and trims multiple newlines into
one.

According to POSIX, a line is a sequence of zero or more non-' <newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

cron/README

@@ -12,4 +12,3 @@ The actual crontab for docweb should look something like this:
 0 0 * * * /path/to/docweb/cron/cron daily
 0 0 * * 1 /path/to/docweb/cron/cron weekly
 0 0 1 * * /path/to/docweb/cron/cron monthly
-