tidy-up: miscellaneous

- INSTALL-CMAKE.md: add missing periods, text fixes.
- md4, md5: sync variables names.
- curl_trc: sync an argument type.
- docs/examples: sync debug/trace function copies, constify, tidy-ups.
- replace commented code with `#if 0`.
- drop redundant parenthesis (macro values, `return`, around single
  variables, function calls).
- fix indentation, apply clang-format in places.

Closes #20481

src/terminal.c

@@ -39,7 +39,6 @@
  * get_terminal_columns() returns the number of columns in the current
  * terminal. It will return 79 on failure. Also, the number can be big.
  */
-
 unsigned int get_terminal_columns(void)
 {
   unsigned int width = 0;

src/tool_doswin.c

@@ -46,7 +46,7 @@
 #  ifdef S_IFCHR
 #    define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
 #  else
-#    define S_ISCHR(m) (0) /* cannot tell if file is a device */
+#    define S_ISCHR(m) 0 /* cannot tell if file is a device */
 #  endif
 #endif
 

src/tool_getparam.c

@@ -2880,7 +2880,7 @@ static ParameterError opt_string(struct OperationConfig *config,
 /* detect e2 80 80 - e2 80 ff */
 static bool has_leading_unicode(const unsigned char *arg)
 {
-  return ((arg[0] == 0xe2) && (arg[1] == 0x80) && (arg[2] & 0x80));
+  return (arg[0] == 0xe2) && (arg[1] == 0x80) && (arg[2] & 0x80);
 }
 
 /* the longest command line option, excluding the leading -- */
@@ -3081,7 +3081,7 @@ ParameterError parse_args(int argc, argv_item_t argv[])
         }
 
         err = getparameter(orig_opt, nextarg, &passarg, config,
-                              CONFIG_MAX_LEVELS);
+                           CONFIG_MAX_LEVELS);
 
         unicodefree(CURL_UNCONST(nextarg));
         config = global->last;

src/tool_ipfs.c

@@ -33,7 +33,7 @@
 static bool has_trailing_slash(const char *input)
 {
   size_t len = strlen(input);
-  return (len && input[len - 1] == '/');
+  return len && input[len - 1] == '/';
 }
 
 static char *ipfs_gateway(void)

src/tool_operhlp.c

@@ -53,7 +53,7 @@ bool output_expected(const char *url, const char *uploadfile)
   if(!uploadfile)
     return TRUE;  /* download */
   if(checkprefix("http://", url) || checkprefix("https://", url))
-    return TRUE;   /* HTTP(S) upload */
+    return TRUE;  /* HTTP(S) upload */
 
   return FALSE; /* non-HTTP upload, probably no output should be expected */
 }

src/tool_setopt.c

@@ -342,7 +342,7 @@ CURLcode tool_setopt_bitmask(CURL *curl, const char *name, CURLoption tag,
         /* all value flags contained in rest */
         rest &= ~nv->value;    /* remove bits handled here */
         result = easysrc_addf(&easysrc_code, "%s(long)%s%s",
-                           preamble, nv->name, rest ? " |" : ");");
+                              preamble, nv->name, rest ? " |" : ");");
         if(!rest || result)
           break;                /* handled them all */
         /* replace with all spaces for continuation line */
@@ -707,6 +707,7 @@ CURLcode tool_setopt_str(CURL *curl, struct OperationConfig *config,
 /* return TRUE if the error code is "lethal" */
 bool setopt_bad(CURLcode result)
 {
-  return (result && (result != CURLE_NOT_BUILT_IN) &&
-          (result != CURLE_UNKNOWN_OPTION));
+  return result &&
+         (result != CURLE_NOT_BUILT_IN) &&
+         (result != CURLE_UNKNOWN_OPTION);
 }

src/tool_urlglob.c

@@ -455,7 +455,7 @@ static CURLcode glob_parse(struct URLGlob *glob, const char *pattern,
     if(curlx_dyn_len(&glob->buf)) {
       /* we got a literal string, add it as a single-item list */
       result = glob_fixed(glob, curlx_dyn_ptr(&glob->buf),
-                       curlx_dyn_len(&glob->buf));
+                          curlx_dyn_len(&glob->buf));
       if(!result)
         result = add_glob(glob, pos);
       curlx_dyn_reset(&glob->buf);

src/tool_vms.h

@@ -38,7 +38,7 @@ int is_vms_shell(void);
 void vms_special_exit(int code, int vms_show);
 
 #undef exit
-#define exit(__code) vms_special_exit((__code), (0))
+#define exit(__code) vms_special_exit(__code, 0)
 
 #define VMS_STS(c, f, e, s)                                                \
   (((c & 0xF) << 28) | ((f & 0xFFF) << 16) | ((e & 0x1FFF) < 3) | (s & 7))