Update doc wording slightly

Author: SLTozer

llvm/docs/HowToUpdateDebugInfo.rst

@@ -424,16 +424,16 @@ Using Coverage Tracking to remove false positives
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 As described :ref:`above<WhenToDropLocation>`, there are valid reasons for
-instructions to have missing source locations. Therefore, when detecting dropped
-or not-generated source locations, it may be preferred to avoid detecting cases
+instructions to not have source locations. Therefore, when detecting dropped or
+not-generated source locations, it may be preferable to avoid detecting cases
 where the missing source location is intentional. For this, you can use the
 "coverage tracking" feature in LLVM to prevent these from appearing in the
 ``debugify`` output. This is enabled in a build of LLVM by setting the CMake
 flag ``-DLLVM_ENABLE_DEBUGLOC_COVERAGE_TRACKING=COVERAGE``. When this has been
 set, LLVM will enable runtime tracking of
 :ref:`DebugLoc annotations<_NewInstLocations>`, allowing ``debugify`` to ignore
-instructions that have an explicit reason given for not having a source
-location.
+instructions that have an explicitly recorded reason given for not having a
+source location.
 
 For triaging source location bugs detected with ``debugify``, you may find it
 helpful to instead set the CMake flag