src/ formatting

Clean up quite a bit of minor things found with simple grep patterns:
operator at end of continued line instead of beginning of continuation
(and a few comments which produced false matches, so that they won't
do so next time), trailing spaces (only one or two of those), tabs (a
dozen or so of those), several casts which didn't have a space between
the type and the expression (I wasn't systematic about finding these).

I think the only code change was in the function for the help command.

src/dothrow.c

@@ -1287,9 +1287,10 @@ boolean twoweap; /* used to restore twoweapon mode if wielded weapon returns */
             pline("%s returns to your hand!", The(xname(thrownobj)));
             thrownobj = addinv(thrownobj);
             (void) encumber_msg();
-            if (thrownobj->owornmask & W_QUIVER) /* in case addinv() autoquivered */
+            /* in case addinv() autoquivered */
+            if (thrownobj->owornmask & W_QUIVER)
                 setuqwep((struct obj *) 0);
-            setuwep(thrownobj);            
+            setuwep(thrownobj);
         } else {
             /* ball is not picked up by monster */
             if (obj != uball)