tidy-up: miscellaneous

- apply more clang-format.
- lib/version: use `CURL_ARRAYSIZE()`.
- INSTALL-CMAKE.md: sync-up an option description with others.
- examples: delete unused main args.
- examples/ftpgetinfo: document `_CRT_SECURE_NO_WARNINGS` symbol.
- delete remaining stray duplicate lines.
- acinclude.m4: drop an unnecessary x-hack.
- vtls/mbedtls: join a URL split into two lines.
- src/tool_cb_see: add parentheses around macro expressions.
- src/tool_operate: move literals to the right side of comparisons.
- libtests: sync up fopen/fstat error messages between tests.
- curl_setup.h: replace `if ! defined __LP64` with `ifndef __LP64`.
  I assume it makes no difference on Tandem systems, as the latter form
  is already used in `include/curl/system.h`.

Closes #20018

lib/vssh/libssh.c

@@ -282,7 +282,6 @@ static const char *myssh_statename(sshstate state)
 #define myssh_statename(x)    ""
 #endif /* !CURL_DISABLE_VERBOSE_STRINGS */
 
-
 #define myssh_to(x, y, z) myssh_set_state(x, y, z)
 
 /*

lib/vssh/libssh2.c

@@ -123,7 +123,6 @@ const struct Curl_handler Curl_handler_scp = {
   PROTOPT_NOURLQUERY | PROTOPT_CONN_REUSE
 };
 
-
 /*
  * SFTP protocol handler.
  */
@@ -353,7 +352,6 @@ static const char *myssh_statename(sshstate state)
 #define myssh_statename(x)    ""
 #endif /* !CURL_DISABLE_VERBOSE_STRINGS */
 
-
 #define myssh_state(x, y, z) myssh_set_state(x, y, z)
 
 /*