Sync leading and final newlines in source code files

This patch adds missing newlines, trims multiple redundant final
newlines into a single one, and trims redundant leading newlines.

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

pear/Makefile.frag

@@ -34,4 +34,3 @@ install-pear:
 	else \
 		cat $(srcdir)/install-pear.txt; \
 	fi
-

pear/fetch.php

@@ -72,5 +72,3 @@ if (is_resource($fp) && file_put_contents($argv[2], $fp)) {
 $err = error_get_last();
 echo "\nError..\n", $err["message"], "\n";
 exit(1);
-
-