Aligned with C++14 and fixed a couple non-ascii characters

Signed-off-by: Matthew Ballance <matt.ballance@gmail.com>

src/V3Active.cpp

@@ -753,7 +753,7 @@ public:
 
         // Release the owned AstSenTree nodes that were unlinked from AstCovergroup during
         // the first pass; they are no longer needed after all clones have been made.
-        for (auto& [classp, evtp] : m_covergroupEvents) VL_DO_DANGLING(evtp->deleteTree(), evtp);
+        for (const auto& itpair : m_covergroupEvents) itpair.second->deleteTree();
 
         UINFO(4, "CovergroupSamplingVisitor: Complete" << endl);
     }

src/V3Covergroup.cpp

@@ -859,7 +859,7 @@ class FunctionalCoverageVisitor final : public VNVisitor {
 
     // Build condition for a single transition item.
     // Returns expression that checks if exprp matches the item's value/range list.
-    // Overload for when the expression is a variable read — creates and manages the VarRef
+    // Overload for when the expression is a variable read -- creates and manages the VarRef
     // internally, so callers don't need to construct a temporary node.
     AstNodeExpr* buildTransitionItemCondition(AstCoverTransItem* itemp, AstVar* varp) {
         AstNodeExpr* varRefp = new AstVarRef{varp->fileline(), varp, VAccess::READ};

test_regress/t/t_covergroup_iff.v

@@ -7,8 +7,8 @@
 
 // Test iff (enable) guard: sampling is gated by the enable condition.
 // Samples taken while enable=0 must not increment bins.
-// Bins 'disabled_*' are sampled only with enable=0 — they must NOT appear in
-// coverage.dat. Bins 'enabled_*' are sampled only with enable=1 — they must
+// Bins 'disabled_*' are sampled only with enable=0 -- they must NOT appear in
+// coverage.dat. Bins 'enabled_*' are sampled only with enable=1 -- they must
 // appear. This makes pass/fail unambiguous from the coverage report alone.
 
 module t;
@@ -27,12 +27,12 @@ module t;
   cg_iff cg = new;
 
   initial begin
-    // Sample disabled_lo and disabled_hi with enable=0 — must not be recorded
+    // Sample disabled_lo and disabled_hi with enable=0 -- must not be recorded
     enable = 0;
     value = 1; cg.sample();
     value = 2; cg.sample();
 
-    // Sample enabled_lo and enabled_hi with enable=1 — must be recorded
+    // Sample enabled_lo and enabled_hi with enable=1 -- must be recorded
     enable = 1;
     value = 3; cg.sample();
     value = 4; cg.sample();