Fix parantheses on return and sizeof statements.

Used script:
```
import re
import sys

for arg in sys.argv[1:]:
    print(arg)
    with open(arg, 'r') as file:
        content = file.read()
        content = re.sub(r"return\s?\((?!.*\).*\()\s*\n?(.*)\n?\);", r"return \1;", \
            content, flags = re.M)
        content = re.sub(r"sizeof ([^\(][a-zA-Z0-9_\[\]]*)", r"sizeof(\1)",\
            content, flags = re.M)
    with open(arg, 'w') as file:
        file.write(content)

```
Executed with:
` find . -regextype posix-egrep -regex ".*\.([hc]|fmt|function)" | xargs -L1 python script.py`

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index 7481c5b..0071f6f 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -123,14 +123,14 @@
 
     if( dup_fd == -1 )
     {
-        return( -1 );
+        return -1 ;
     }
 
     path_stream = fopen( path, "w" );
     if( path_stream == NULL )
     {
         close( dup_fd );
-        return( -1 );
+        return -1 ;
     }
 
     fflush( out_stream );
@@ -138,11 +138,11 @@
     {
         close( dup_fd );
         fclose( path_stream );
-        return( -1 );
+        return -1 ;
     }
 
     fclose( path_stream );
-    return( dup_fd );
+    return dup_fd ;
 }
 
 static int restore_output( FILE* out_stream, int dup_fd )
@@ -154,10 +154,10 @@
     {
         close( out_fd );
         close( dup_fd );
-        return( -1 );
+        return -1 ;
     }
 
     close( dup_fd );
-    return( 0 );
+    return 0 ;
 }
 #endif /* __unix__ || __APPLE__ __MACH__ */