Update comments

Author: mrkajetanp

flang/lib/Semantics/resolve-names.cpp

@@ -1661,6 +1661,9 @@ class OmpVisitor : public virtual DeclarationVisitor {
   }
   bool Pre(const parser::OpenMPDeclarativeConstruct &x) {
     AddOmpSourceRange(x.source);
+    // Without skipping implicit typing, declarative constructs
+    // can implicitly declare variables instead of only using the
+    // ones already declared in the Fortran sources.
     SkipImplicitTyping(true);
     return true;
   }

flang/test/Semantics/OpenMP/declare-simd-linear.f90

@@ -1,5 +1,5 @@
 ! RUN: %python %S/../test_errors.py %s %flang -fopenmp
-! Test declare simd with linear clause
+! Test declare simd with linear clause does not cause an implicit declaration of i
 
 module mod
 contains