Fix Codacy warnings. No functional change.

docs/_static/css/vlt_sphinx.css

@@ -1,16 +1,25 @@
-/*Verilator blue #008fd7; set in html*/
+/* Verilator blue #008fd7; set in html */
+
 .wy-side-nav-search > div.version {
-    color: #111;
+  color: #111;
 }
-.fa-github::before, .icon-github::before {
-    content: "";
+
+.fa-github::before,
+.icon-github::before {
+  content: "";
 }
-.fa-home::before, .icon-home::before {
-    content: "";
+
+.fa-home::before,
+.icon-home::before {
+  content: "";
 }
-.fa-arrow-circle-right::before, .icon-circle-arrow-right::before {
-    content: "";
+
+.fa-arrow-circle-right::before,
+.icon-circle-arrow-right::before {
+  content: "";
 }
-.fa-arrow-circle-left::before, .icon-circle-arrow-left::before {
-    content: "";
+
+.fa-arrow-circle-left::before,
+.icon-circle-arrow-left::before {
+  content: "";
 }

src/V3AstNodes.cpp

@@ -1458,10 +1458,10 @@ void AstRefDType::dump(std::ostream& str) const {
         if (!s_recursing) {  // Prevent infinite dump if circular typedefs
             s_recursing = true;
             str << " -> ";
-            if (typedefp()) {
-                typedefp()->dump(str);
-            } else if (subDTypep()) {
-                subDTypep()->dump(str);
+            if (const auto subp = typedefp()) {
+                subp->dump(str);
+            } else if (const auto subp = subDTypep()) {
+                subp->dump(str);
             }
             s_recursing = false;
         }
@@ -1506,7 +1506,8 @@ void AstNodeArrayDType::dump(std::ostream& str) const {
 }
 string AstPackArrayDType::prettyDTypeName() const {
     std::ostringstream os;
-    os << subDTypep()->prettyDTypeName() << declRange();
+    if (const auto subp = subDTypep()) os << subp->prettyDTypeName();
+    os << declRange();
     return os.str();
 }
 string AstUnpackArrayDType::prettyDTypeName() const {

src/V3Graph.cpp

@@ -133,10 +133,10 @@ void V3GraphVertex::v3errorEnd(std::ostringstream& str) const {
         nsstr << endl;
         nsstr << "-vertex: " << this << endl;
     }
-    if (!fileline()) {
-        V3Error::v3errorEnd(nsstr);
+    if (FileLine* const flp = fileline()) {
+        flp->v3errorEnd(nsstr);
     } else {
-        fileline()->v3errorEnd(nsstr);
+        V3Error::v3errorEnd(nsstr);
     }
 }
 void V3GraphVertex::v3errorEndFatal(std::ostringstream& str) const {