Removed UNITY_OMIT_OUTPUT_FLUSH_HEADER_DECLARATION to simplify the behaviour

docs/UnityConfigurationGuide.md

@@ -248,7 +248,8 @@ _Example:_
 Say you are forced to run your test suite on an embedded processor with no
 `stdout` option. You decide to route your test result output to a custom serial
 `RS232_putc()` function you wrote like thus:
-
+        #include "RS232_header.h"
+        ...
         #define UNITY_OUTPUT_CHAR(a) RS232_putc(a)
         #define UNITY_OUTPUT_START() RS232_config(115200,1,8,0)
         #define UNITY_OUTPUT_FLUSH() RS232_flush()
@@ -256,10 +257,7 @@ Say you are forced to run your test suite on an embedded processor with no
 
 _Note:_
 `UNITY_OUTPUT_FLUSH()` can be set to the standard out flush function simply by
-specifying `UNITY_USE_FLUSH_STDOUT`. No other defines are required. If you
-specify a custom flush function instead with `UNITY_OUTPUT_FLUSH` directly, it
-will declare an instance of your function by default. If you want to disable
-this behavior, add `UNITY_OMIT_OUTPUT_FLUSH_HEADER_DECLARATION`.
+specifying `UNITY_USE_FLUSH_STDOUT`. No other defines are required.
 
 
 ##### `UNITY_WEAK_ATTRIBUTE`

src/unity_internals.h

@@ -241,30 +241,30 @@ typedef UNITY_FLOAT_TYPE UNITY_FLOAT;
  * Output Method: stdout (DEFAULT)
  *-------------------------------------------------------*/
 #ifndef UNITY_OUTPUT_CHAR
-/* Default to using putchar, which is defined in stdio.h */
-#include <stdio.h>
-#define UNITY_OUTPUT_CHAR(a) (void)putchar(a)
+  /* Default to using putchar, which is defined in stdio.h */
+  #include <stdio.h>
+  #define UNITY_OUTPUT_CHAR(a) (void)putchar(a)
 #else
   /* If defined as something else, make sure we declare it here so it's ready for use */
   #ifdef UNITY_OUTPUT_CHAR_HEADER_DECLARATION
-extern void UNITY_OUTPUT_CHAR_HEADER_DECLARATION;
+    extern void UNITY_OUTPUT_CHAR_HEADER_DECLARATION;
   #endif
 #endif
 
 #ifndef UNITY_OUTPUT_FLUSH
-#ifdef UNITY_USE_FLUSH_STDOUT
-/* We want to use the stdout flush utility */
-#include <stdio.h>
-#define UNITY_OUTPUT_FLUSH() (void)fflush(stdout)
-#else
-/* We've specified nothing, therefore flush should just be ignored */
-#define UNITY_OUTPUT_FLUSH()
-#endif
+  #ifdef UNITY_USE_FLUSH_STDOUT
+    /* We want to use the stdout flush utility */
+    #include <stdio.h>
+    #define UNITY_OUTPUT_FLUSH() (void)fflush(stdout)
+  #else
+    /* We've specified nothing, therefore flush should just be ignored */
+    #define UNITY_OUTPUT_FLUSH()
+  #endif
 #else
-/* We've defined flush as something else, so make sure we declare it here so it's ready for use */
-#ifdef UNITY_OUTPUT_FLUSH_HEADER_DECLARATION
-extern void UNITY_OMIT_OUTPUT_FLUSH_HEADER_DECLARATION;
-#endif
+  /* If defined as something else, make sure we declare it here so it's ready for use */
+  #ifdef UNITY_OUTPUT_FLUSH_HEADER_DECLARATION
+    extern void UNITY_OUTPUT_FLUSH_HEADER_DECLARATION;
+  #endif
 #endif
 
 #ifndef UNITY_OUTPUT_FLUSH