tidy-up: miscellaneous

- vms/curlmsg_vms.h: delete unused/commented code.
- vtls/schannel_verify: sort includes.
- typecheck-gcc.h: fix indent and alignment.
- lib/config-win32.h: drop idle `#undef`.
- spacecheck: check for stray empty lines before after curly braces.
- make literals more readable: 1048576 -> 1024 * 1024
- scope variables.
- use ISO date in a comment.
- drop redundant parentheses.
- drop empty comments.
- unfold lines.
- duplicate/stray spaces in comments.
- fix indent, whitespace, minor typos.

Closes #20690

docs/examples/chkspeed.c

@@ -172,7 +172,7 @@ int main(int argc, const char *argv[])
     /* specify URL to get */
     curl_easy_setopt(curl, CURLOPT_URL, url);
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* some servers do not like requests that are made without a user-agent

docs/examples/externalsocket.c

@@ -100,7 +100,7 @@ int main(void)
 {
   CURL *curl;
   CURLcode result;
-  struct sockaddr_in servaddr;  /*  socket address structure  */
+  struct sockaddr_in servaddr;  /* socket address structure */
   curl_socket_t sockfd;
 
   result = curl_global_init(CURL_GLOBAL_ALL);
@@ -141,7 +141,7 @@ int main(void)
     /* no progress meter please */
     curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* call this function to get a socket */

docs/examples/getinmemory.c

@@ -78,7 +78,7 @@ int main(void)
     /* specify URL to get */
     curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* we pass our 'chunk' struct to the callback function */

docs/examples/htmltidy.c

@@ -35,7 +35,7 @@
 
 #include <curl/curl.h>
 
-/* curl write callback, to fill tidy's input buffer...  */
+/* curl write callback, to fill tidy's input buffer... */
 static uint write_cb(char *in, uint size, uint nmemb, TidyBuffer *out)
 {
   uint r;

docs/examples/http2-pushinmemory.c

@@ -77,7 +77,7 @@ static void setup(CURL *curl)
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
   curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
 
-  /* write data to a struct  */
+  /* write data to a struct */
   curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
   init_memory(&files[0]);
   curl_easy_setopt(curl, CURLOPT_WRITEDATA, &files[0]);

docs/examples/imap-search.c

@@ -56,7 +56,7 @@ int main(void)
      * this can contain a message sequence set and a number of search criteria
      * keywords including flags such as ANSWERED, DELETED, DRAFT, FLAGGED, NEW,
      * RECENT and SEEN. For more information about the search criteria please
-     * see RFC-3501 section 6.4.4.   */
+     * see RFC-3501 section 6.4.4. */
     curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "SEARCH NEW");
 
     /* Perform the custom request */

docs/examples/maxconnects.c

@@ -47,7 +47,7 @@ int main(void)
     };
     int i = 0;
 
-    /* Change the maximum number of persistent connection   */
+    /* Change the maximum number of persistent connection */
     curl_easy_setopt(curl, CURLOPT_MAXCONNECTS, 1L);
 
     curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

docs/examples/postinmemory.c

@@ -74,7 +74,7 @@ int main(void)
   if(curl) {
     curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.org/");
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* we pass our 'chunk' struct to the callback function */

docs/examples/sepheaders.c

@@ -64,7 +64,7 @@ int main(void)
     /* no progress meter please */
     curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* open the header file */

docs/examples/smtp-expn.c

@@ -53,7 +53,7 @@ int main(void)
     /* This is the URL for your mailserver */
     curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
 
-    /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array  */
+    /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array */
     recipients = curl_slist_append(recipients, "Friends");
     curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
 

docs/examples/smtp-vrfy.c

@@ -56,7 +56,7 @@ int main(void)
     /* This is the URL for your mailserver */
     curl_easy_setopt(curl, CURLOPT_URL, "smtp://mail.example.com");
 
-    /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array  */
+    /* Note that the CURLOPT_MAIL_RCPT takes a list, not a char array */
     recipients = curl_slist_append(recipients, "<recipient@example.com>");
     curl_easy_setopt(curl, CURLOPT_MAIL_RCPT, recipients);
 

docs/examples/url2file.c

@@ -74,7 +74,7 @@ int main(int argc, const char *argv[])
     /* disable progress meter, set to 0L to enable it */
     curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
 
-    /* send all data to this function  */
+    /* send all data to this function */
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
 
     /* open the file */

docs/examples/version-check.pl

@@ -58,7 +58,6 @@ while(<S>) {
             $rem{$sym}=$a[2];
         }
     }
-
 }
 
 close(S);