Update c26430.md

small edits

Author: TylerMSFT

docs/code-quality/c26430.md

@@ -68,7 +68,7 @@ void merge_states(gsl::not_null<const state *> left, gsl::not_null<const state *
 
 ## Heuristics
 
-This rule doesn't enforce every dereference of a pointer to have a prior null check to ensure the pointer isn't. Instead, it requires a null check before first dereference of the pointer. The following function doesn't trigger C26430:
+When ensuring that a dereference of a pointer isn't null, this rule doesn't require *every* dereference to have a prior null check. Instead, it requires a null check before *first* dereference of the pointer. The following function doesn't trigger C26430:
 
 ```cpp
 void f(int* p)
@@ -92,7 +92,7 @@ void f(bool b, int* p)
 
 Rules [C26822](c26822.md) and [C26823](c26823.md) apply to dereferencing a (possibly) null pointer.  
 
-This rule doesn't have full data flow tracking. It can produce incorrect results in cases where indirect checks are used, such as when an intermediate variable holds a null value and is later used in a comparison.
+This rule doesn't do full data flow tracking. It can produce incorrect results in cases where indirect checks are used, such as when an intermediate variable holds a null value and is later used in a comparison.
 
 ## See also