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

lib/vquic/curl_ngtcp2.c

@@ -1607,7 +1607,6 @@ static CURLcode h3_stream_open(struct Curl_cfilter *cf,
                                   0, pnwritten);
   if(result)
     goto out;
-
   if(!stream->h1.done) {
     /* need more data */
     goto out;

lib/vquic/curl_quiche.c

@@ -51,7 +51,7 @@
 #include "../vtls/vtls.h"
 
 /* HTTP/3 error values defined in RFC 9114, ch. 8.1 */
-#define CURL_H3_NO_ERROR  (0x0100)
+#define CURL_H3_NO_ERROR  0x0100
 
 #define QUIC_MAX_STREAMS              (100)