some reformatting (5 of 4)

Take care of most of include/*.h.  I punted on extern.h.

For both src/*.c and include/*.h, I used mismatched checks of
width > 79 to decide which files to look at and then width > 78
to decide which lines to maybe revise, so I didn't look at a bunch
of the files.

I don't plan to go back and do it right.  Shortening lines that are
80 or wider to less than 80 is the significant part.  Otherwise
emacs puts a backslash in column 80 and the rest of the line of text
on the next line of the screen, making things harder to read.

include/cstd.h

@@ -1,4 +1,4 @@
-/* NetHack 3.7	cstd.h	$NHDT-Date: 1596498562 2020/08/03 23:49:22 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.24 $ */
+/* NetHack 3.7	cstd.h	$NHDT-Date: 1725652996 2024/09/06 20:03:16 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.6 $ */
 /*-Copyright (c) Robert Patrick Rankin, 2017. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -8,11 +8,10 @@
 /*
  * The list of standard (C99 unless noted otherwise) header files:
  *
- * <assert.h>	         Conditionally compiled macro that compares its argument
- *                       to zero
+ * <assert.h>	         Conditionally compiled macro that calls abort if its
+ *                       argument evaluates to zero
  * <complex.h> (C99)     Complex number arithmetic
- * <ctype.h>	         Functions to determine the type contained in character
- *                       data
+ * <ctype.h>	         Functions to categorize single characters
  * <errno.h>	         Macros reporting error conditions
  * <fenv.h> (C99)        Floating-point environment
  * <float.h>             Limits of floating-point types
@@ -29,20 +28,22 @@
  * <stdint.h> (C99)      Fixed-width integer types
  * <stdio.h>             Input/output program utilities
  *
- * General utilities:    memory management, program utilities, string conversions,
- *                       random numbers, algorithms
+ * General utilities:    memory management, program utilities, string
+ *                       conversions, random numbers, algorithms
  * <string.h>            String handling
- * <tgmath.h> (C99)      Type-generic math (macros wrapping math.h and complex.h)
+ * <tgmath.h> (C99)      Type-generic math (macros wrapping math.h and
+ *                       complex.h)
  * <time.h>              Time/date utilities
  * <wchar.h> (C95)       Extended multibyte and wide character utilities
- * <wctype.h> (C95)      Functions to determine the type contained in wide character data
+ * <wctype.h> (C95)      Functions to categorize single wide character
 
  * We watch these and try not to conflict with them, or make it tough to adopt
  * these in future:
  *
  * <stdalign.h> (C11)    alignas and alignof convenience macros
  * <stdatomic.h> (C11)   Atomic operations
- * <stdbit.h> (C23)      Macros to work with the byte and bit representations of types
+ * <stdbit.h> (C23)      Macros to work with the byte and bit representations
+ *                       of types
  * <stdckdint.h> (C23)   Macros for performing checked integer arithmetic
  * <stdnoreturn.h> (C11) noreturn convenience macro
  * <threads.h> (C11)     Thread library