tidy-up: miscellaneous

- drop stray duplicate empty lines in docs, scripts, test data, include,
  examples, tests.
- drop duplicate PP parenthesis.
- curl-functions.m4: move literals to the right side in if expressions,
  to match rest of the source code.
- FAQ.md: delete language designator from an URL.
- packages: apply clang-format (OS400, VMS).
- scripts/schemetable.c: apply clang-format.
- data320: delete duplicate empty line that doesn't change the outcome.
- spacecheck: extend to check for duplicate empty lines
  (with exceptions.)
- fix whitespace nits

Closes #19936

lib/cf-https-connect.h

@@ -44,6 +44,5 @@ CURLcode Curl_cf_https_setup(struct Curl_easy *data,
                              struct connectdata *conn,
                              int sockindex);
 
-
 #endif /* !CURL_DISABLE_HTTP */
 #endif /* HEADER_CURL_CF_HTTP_H */

lib/cfilters.h

@@ -316,7 +316,6 @@ void Curl_conn_cf_discard_all(struct Curl_easy *data,
                               struct connectdata *conn,
                               int sockindex);
 
-
 CURLcode Curl_conn_cf_connect(struct Curl_cfilter *cf,
                               struct Curl_easy *data,
                               bool *done);

lib/config-os400.h

@@ -132,7 +132,6 @@
 /* Define if you have the `socket' function. */
 #define HAVE_SOCKET
 
-
 /* The following define is needed on OS400 to enable strcmpi(), stricmp() and
    strdup(). */
 #define __cplusplus__strings__

lib/curl_hmac.h

@@ -48,7 +48,6 @@ struct HMAC_params {
   unsigned int     resultlen; /* Result length (bytes). */
 };
 
-
 /* HMAC computation context. */
 struct HMAC_context {
   const struct HMAC_params *hash; /* Hash function definition. */

lib/curl_memrchr.h

@@ -35,7 +35,7 @@
 
 #else /* HAVE_MEMRCHR */
 void *Curl_memrchr(const void *s, int c, size_t n);
-#define memrchr(x, y, z)  Curl_memrchr((x), (y), (z))
+#define memrchr(x, y, z)  Curl_memrchr(x, y, z)
 
 #endif /* HAVE_MEMRCHR */
 

lib/curl_setup_once.h

@@ -160,7 +160,6 @@ struct timeval {
 #endif
 #endif /* HAVE_RECV */
 
-
 #ifdef __minix
 /* Minix does not support send on TCP sockets */
 #define swrite(x, y, z) (ssize_t)write((SEND_TYPE_ARG1)(x), \

lib/curl_trc.h

@@ -65,7 +65,6 @@ void Curl_failf(struct Curl_easy *data,
 #define CURL_LOG_LVL_NONE  0
 #define CURL_LOG_LVL_INFO  1
 
-
 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 #define CURL_HAVE_C99
 #endif

lib/cw-pause.h

@@ -36,5 +36,4 @@ extern const struct Curl_cwtype Curl_cwt_pause;
 
 CURLcode Curl_cw_pause_flush(struct Curl_easy *data);
 
-
 #endif /* HEADER_CURL_CW_PAUSE_H */

lib/dynhds.h

@@ -126,7 +126,6 @@ size_t Curl_dynhds_remove(struct dynhds *dynhds,
                           const char *name, size_t namelen);
 size_t Curl_dynhds_cremove(struct dynhds *dynhds, const char *name);
 
-
 /**
  * Set the give header name and value, replacing any entries with
  * the same name. The header is added at the end of all (remaining)

lib/functypes.h

@@ -68,7 +68,6 @@
 #define SEND_TYPE_RETV int
 #endif
 
-
 #ifndef RECV_TYPE_ARG1
 #define RECV_TYPE_ARG1 int
 #endif

lib/hostip.h

@@ -116,7 +116,6 @@ bool Curl_ipv6works(struct Curl_easy *data);
 #define Curl_ipv6works(x) FALSE
 #endif
 
-
 /* unlink a dns entry, potentially shared with a cache */
 void Curl_resolv_unlink(struct Curl_easy *data,
                         struct Curl_dns_entry **pdns);

lib/http.h

@@ -213,7 +213,6 @@ Curl_http_output_auth(struct Curl_easy *data,
 /* Decode HTTP status code string. */
 CURLcode Curl_http_decode_status(int *pstatus, const char *s, size_t len);
 
-
 /**
  * All about a core HTTP request, excluding body and trailers
  */

lib/ldap.c

@@ -95,7 +95,7 @@
 #define curl_ldap_num_t    ULONG
 #else
 #define FREE_ON_WINLDAP(x)
-#define curl_ldap_num_t int
+#define curl_ldap_num_t    int
 #endif
 
 #ifndef HAVE_LDAP_URL_PARSE

lib/optiontable.pl

@@ -77,7 +77,6 @@ sub add {
     }
 }
 
-
 my $fl;
 while(<STDIN>) {
     my $l = $_;
@@ -122,7 +121,6 @@ while(<STDIN>) {
     }
 }
 
-
 for my $name (sort @names) {
     my $oname = $name;
     my $a = $alias{$name};

lib/setup-os400.h

@@ -76,7 +76,6 @@ extern OM_uint32 Curl_gss_import_name_a(OM_uint32 * minor_status,
                                         gss_name_t * out_name);
 #define gss_import_name         Curl_gss_import_name_a
 
-
 extern OM_uint32 Curl_gss_display_status_a(OM_uint32 * minor_status,
                                            OM_uint32 status_value,
                                            int status_type, gss_OID mech_type,
@@ -84,7 +83,6 @@ extern OM_uint32 Curl_gss_display_status_a(OM_uint32 * minor_status,
                                            gss_buffer_t status_string);
 #define gss_display_status      Curl_gss_display_status_a
 
-
 extern OM_uint32 Curl_gss_init_sec_context_a(OM_uint32 * minor_status,
                                              gss_cred_id_t cred_handle,
                                              gss_ctx_id_t * context_handle,
@@ -101,13 +99,11 @@ extern OM_uint32 Curl_gss_init_sec_context_a(OM_uint32 * minor_status,
                                              OM_uint32 * time_rec);
 #define gss_init_sec_context    Curl_gss_init_sec_context_a
 
-
 extern OM_uint32 Curl_gss_delete_sec_context_a(OM_uint32 *minor_status,
                                                gss_ctx_id_t *context_handle,
                                                gss_buffer_t output_token);
 #define gss_delete_sec_context  Curl_gss_delete_sec_context_a
 
-
 /* LDAP wrappers. */
 
 #define BerValue                struct berval

lib/urldata.h

@@ -133,7 +133,6 @@ typedef unsigned int curl_prot_t;
    input easier and better. */
 #define CURL_MAX_INPUT_LENGTH 8000000
 
-
 #include "cookie.h"
 #include "psl.h"
 #include "formdata.h"

lib/vquic/vquic.h

@@ -40,7 +40,6 @@ CURLcode Curl_qlogdir(struct Curl_easy *data,
                       size_t scidlen,
                       int *qlogfdp);
 
-
 CURLcode Curl_cf_quic_create(struct Curl_cfilter **pcf,
                              struct Curl_easy *data,
                              struct connectdata *conn,

lib/vtls/gtls.c

@@ -306,7 +306,7 @@ static gnutls_x509_crt_fmt_t gnutls_do_file_type(const char *type)
   return GNUTLS_X509_FMT_PEM; /* default to PEM */
 }
 
-#define GNUTLS_CIPHERS "NORMAL:%PROFILE_MEDIUM:-ARCFOUR-128:"\
+#define GNUTLS_CIPHERS "NORMAL:%PROFILE_MEDIUM:-ARCFOUR-128:" \
   "-CTYPE-ALL:+CTYPE-X509"
 /* If GnuTLS was compiled without support for SRP it will error out if SRP is
    requested in the priority string, so treat it specially

lib/vtls/x509asn1.c

@@ -54,7 +54,7 @@
  */
 
 /* Largest supported ASN.1 structure. */
-#define CURL_ASN1_MAX                   ((size_t) 0x40000)      /* 256K */
+#define CURL_ASN1_MAX                   ((size_t)0x40000)      /* 256K */
 
 /* ASN.1 classes. */
 /* #define CURL_ASN1_UNIVERSAL             0 */