Adjust abstracts (#78)

Fixes rdar://102988487
Fixes rdar://102988514
Fixes rdar://102995541
Fixes rdar://103188927

Author: amartini51

Sources/TSPL/TSPL.docc/LanguageGuide/BasicOperators.md

@@ -1,6 +1,6 @@
 # Basic Operators
 
-Perform assignment, arithmetic, comparison, and Boolean operations.
+Perform operations like assignment, arithmetic, and comparison.
 
 An *operator* is a special symbol or phrase that you use to
 check, change, or combine values.

Sources/TSPL/TSPL.docc/LanguageGuide/ClassesAndStructures.md

@@ -53,7 +53,7 @@ come at the cost of increased complexity.
 As a general guideline,
 prefer structures because they're easier to reason about,
 and use classes when they're appropriate or necessary.
-In practice, this means most of the custom data types you define
+In practice, this means most of the custom types you define
 will be structures and enumerations.
 For a more detailed comparison,
 see [Choosing Between Structures and Classes](https://developer.apple.com/documentation/swift/choosing_between_structures_and_classes).

Sources/TSPL/TSPL.docc/LanguageGuide/NestedTypes.md

@@ -1,6 +1,6 @@
 # Nested Types
 
-Define one data type inside of another data type.
+Define types inside the scope of another type.
 
 Enumerations are often created to support a specific class or structure's functionality.
 Similarly, it can be convenient to define utility classes and structures

Sources/TSPL/TSPL.docc/LanguageGuide/Properties.md

@@ -1547,7 +1547,7 @@ the property wrapper exposes only one piece of information ---
 whether the number was adjusted ---
 so it exposes that Boolean value as its projected value.
 A wrapper that needs to expose more information
-can return an instance of some other data type,
+can return an instance of some other type,
 or it can return `self`
 to expose the instance of the wrapper as its projected value.
 

Sources/TSPL/TSPL.docc/ReferenceManual/Statements.md

@@ -1,6 +1,6 @@
 # Statements
 
-Structure groups of expressions and control their behavior.
+Group expressions and control the flow of execution.
 
 In Swift, there are three kinds of statements: simple statements, compiler control statements,
 and control flow statements.

Sources/TSPL/TSPL.docc/ReferenceManual/Types.md

@@ -1,6 +1,6 @@
 # Types
 
-Use built-in nominal and structural types.
+Use built-in named and compound types.
 
 In Swift, there are two kinds of types: named types and compound types.
 A *named type* is a type that can be given a particular name when it's defined.