clarify au and du in manpage

nnn.1

@@ -148,7 +148,7 @@ supports the following options:
 .Pp
 .Fl "T key"
         sort order
-        keys: 'a'u / 'd'u / 'e'xtension / 'r'everse / 's'ize / 't'ime / 'v'ersion
+        keys: 'a'pparent disk usage / 'd'isk usage / 'e'xtension / 'r'everse / 's'ize / 't'ime / 'v'ersion
         capitalize to reverse (except 'r')
 .Pp
 .Fl u

src/.clang-tidy

@@ -22,10 +22,13 @@ Checks: >
     -readability-identifier-length,
     -readability-isolate-declaration,
     -readability-suspicious-call-argument,
+    -readability-avoid-nested-conditional-operator,
     -bugprone-easily-swappable-parameters,
     -bugprone-narrowing-conversions,
     -bugprone-reserved-identifier,
     -bugprone-switch-missing-default-case,
+    -bugprone-inc-dec-in-conditions,
+    -bugprone-multi-level-implicit-pointer-conversion
 
 WarningsAsErrors: '*'
 HeaderFilterRegex: '.*(?<!lookup3.c)$'

src/nnn.c

@@ -925,7 +925,7 @@ static bool test_set_bit(uint_t nr)
 	nr &= HASH_BITS;
 
 	pthread_mutex_lock(&hardlink_mutex);
-	ullong_t *m = ((ullong_t *)ihashbmp) + (nr >> 6);
+	ullong_t *m = ihashbmp + (nr >> 6);
 
 	if (*m & (1 << (nr & 63))) {
 		pthread_mutex_unlock(&hardlink_mutex);