Incorporate editorial feedback

Edits from rdar://125119047

Co-authored-by: Rebecca Teibloom <[email protected]>

Author: amartini51

TSPL.docc/LanguageGuide/AccessControl.md

@@ -71,7 +71,7 @@ and the package that the module belongs to.
   The difference between open and public access is described below.
 - *Package access*
   enables entities to be used within
-  any source files from their defining package,
+  any source files from their defining package
   but not in any source file outside of that package.
   You typically use package access
   within an app or framework that's structured into multiple modules.

TSPL.docc/ReferenceManual/Declarations.md

@@ -3886,7 +3886,7 @@ Access control is discussed in detail in <doc:AccessControl>.
   it specifies the package name
   by passing the `-package-name` flag to the Swift compiler.
   Two modules are part of the same package
-  if the build system specifies the same package name when building them both.
+  if the build system specifies the same package name when building them.
 
 - term `internal`:
   Apply this modifier to a declaration to indicate the declaration can be accessed