formatting fixup (1 of 2)

Replace instances of strings split across lines which rely on C89/C90
implicit concatenation of string literals to splice them together
with single strings that are outdented relative to the code that uses
them.  It's uglier but it won't break compile for pre-ANSI compilers.

This covers many files in src/ that only have one or two such split
strings.  There are several more files which have three or more.  Those
will eventually be '(2 of 2)'.

Noticed along the way:  the fake mail message/subject
  Report bugs to devteam@nethack.org.
wasn't using its format string of "Report bugs to %s.", so would have
just shown our email address.  Doesn't anybody enable fake mail anymore?

I modified that format to enclose the address within angle brackets and
made a similar change for the 'contact' choice of the '?' command.

src/write.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	write.c	$NHDT-Date: 1432512764 2015/05/25 00:12:44 $  $NHDT-Branch: master $:$NHDT-Revision: 1.13 $ */
+/* NetHack 3.6	write.c	$NHDT-Date: 1436753530 2015/07/13 02:12:10 $  $NHDT-Branch: master $:$NHDT-Revision: 1.14 $ */
 /* NetHack may be freely redistributed.  See license for details. */
 
 #include "hack.h"
@@ -292,8 +292,8 @@ found:
         You("%s to write that.", by_descr ? "fail" : "don't know how");
         /* scrolls disappear, spellbooks don't */
         if (paper->oclass == SPBOOK_CLASS) {
-            You("write in your best handwriting:  \"My Diary\", but it "
-                "quickly fades.");
+            You(
+      "write in your best handwriting:  \"My Diary\", but it quickly fades.");
             update_inventory(); /* pen charges */
         } else {
             if (by_descr) {