tidy-up: whitespace, fix CI spacecheck for docs

Also: fixup CI spacecheck to apply to docs again.

Closes #15423

.github/workflows/checkdocs.yml

@@ -147,3 +147,13 @@ jobs:
 
       - name: verify examples
         run: .github/scripts/verify-examples.pl docs/libcurl/curl*.3 docs/libcurl/opts/*.3
+
+  miscchecks:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        name: checkout
+
+      - name: spacecheck
+        run: .github/scripts/spacecheck.pl

CMake/CurlSymbolHiding.cmake

@@ -38,13 +38,13 @@ unset(CURL_CFLAG_SYMBOLS_HIDE)
 if(CURL_HIDDEN_SYMBOLS)
   if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND NOT MSVC)
     set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
-    set(CURL_EXTERN_SYMBOL "__attribute__ ((__visibility__ (\"default\")))")
+    set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
     set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
   elseif(CMAKE_COMPILER_IS_GNUCC)
     if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
       # Note: This is considered buggy prior to 4.0 but the autotools do not care, so let us ignore that fact
       set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
-      set(CURL_EXTERN_SYMBOL "__attribute__ ((__visibility__ (\"default\")))")
+      set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
       set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
     endif()
   elseif(CMAKE_C_COMPILER_ID MATCHES "SunPro" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 8.0)
@@ -53,7 +53,7 @@ if(CURL_HIDDEN_SYMBOLS)
     set(CURL_CFLAG_SYMBOLS_HIDE "-xldscope=hidden")
   elseif(CMAKE_C_COMPILER_ID MATCHES "Intel" AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 9.0)  # Requires 9.1.045
     set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)
-    set(CURL_EXTERN_SYMBOL "__attribute__ ((__visibility__ (\"default\")))")
+    set(CURL_EXTERN_SYMBOL "__attribute__((__visibility__(\"default\")))")
     set(CURL_CFLAG_SYMBOLS_HIDE "-fvisibility=hidden")
   elseif(MSVC)
     set(CURL_HIDES_PRIVATE_SYMBOLS TRUE)

docs/internals/MQTT.md

@@ -14,6 +14,7 @@ Doing a "POST" publishes the post data to the topic and exits.
 
 
 ### Subscribing
+
 Command usage:
 
     curl mqtt://host/topic
@@ -25,6 +26,7 @@ Example subscribe:
 This will send an MQTT SUBSCRIBE packet for the topic `bedroom/temp` and listen in for incoming PUBLISH packets.
 
 ### Publishing
+
 Command usage:
 
     curl -d payload mqtt://host/topic

lib/conncache.c

@@ -170,7 +170,7 @@ int Curl_cpool_init(struct cpool *cpool,
    * Probably better to have an internal handle owned by the multi that
    * can be used for cpool operations. */
   cpool->idata->multi = multi;
- #ifdef DEBUGBUILD
+#ifdef DEBUGBUILD
   if(getenv("CURL_DEBUG"))
     cpool->idata->set.verbose = TRUE;
 #endif

lib/curl_gssapi.c

@@ -35,7 +35,7 @@
 #include "memdebug.h"
 
 #if defined(__GNUC__)
-#define CURL_ALIGN8   __attribute__ ((aligned(8)))
+#define CURL_ALIGN8  __attribute__((aligned(8)))
 #else
 #define CURL_ALIGN8
 #endif

m4/curl-compilers.m4

@@ -1379,7 +1379,7 @@ AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [
   case "$compiler_id" in
     CLANG|APPLECLANG)
       dnl All versions of clang support -fvisibility=
-      tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+      tmp_EXTERN="__attribute__((__visibility__(\"default\")))"
       tmp_CFLAGS="-fvisibility=hidden"
       supports_symbol_hiding="yes"
       ;;
@@ -1387,7 +1387,7 @@ AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [
       dnl Only gcc 3.4 or later
       if test "$compiler_num" -ge "304"; then
         if $CC --help --verbose 2>/dev/null | grep fvisibility= >/dev/null ; then
-          tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+          tmp_EXTERN="__attribute__((__visibility__(\"default\")))"
           tmp_CFLAGS="-fvisibility=hidden"
           supports_symbol_hiding="yes"
         fi
@@ -1406,7 +1406,7 @@ AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [
               printf("icc fvisibility bug test");
             ]])
           ],[
-            tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))"
+            tmp_EXTERN="__attribute__((__visibility__(\"default\")))"
             tmp_CFLAGS="-fvisibility=hidden"
             supports_symbol_hiding="yes"
           ])