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

src/tool_cb_see.c

@@ -44,8 +44,8 @@ int tool_seek_cb(void *userdata, curl_off_t offset, int whence)
    both represent the same value. Maximum offset used here when we lseek
    using a 'long' data type offset */
 
-#define OUR_MAX_SEEK_L  2147483647L - 1L
-#define OUR_MAX_SEEK_O  0x7FFFFFFF - 0x1
+#define OUR_MAX_SEEK_L (2147483647L - 1L)
+#define OUR_MAX_SEEK_O (0x7FFFFFFF - 0x1)
 
   /* The offset check following here is only interesting if curl_off_t is
      larger than off_t and we are not using the Win32 large file support