Incorporate tech review from @stephentyrone.

Author: amartini51

stdlib/public/core/FloatingPointTypes.swift.gyb

@@ -43,7 +43,8 @@ if Self == 'Float16':
     SelfDocComment = '''\
 /// A half-precision (16b), floating-point value type.
 ///
-/// `Float16` is available on Apple silicon, and unavailable on Intel.'''
+/// `Float16` is available on Apple silicon,
+/// and unavailable on Intel when targeting macOS.'''
 elif Self == 'Float':
     SelfDocComment = '''\
 /// A single-precision, floating-point value type.'''
@@ -56,7 +57,9 @@ elif Self == 'Float80':
     SelfDocComment = '''\
 /// An extended-precision, floating-point value type.
 ///
-/// `Float80` is available on Intel, and unavailable on Apple silicon.'''
+/// `Float80` is available on Intel
+/// when the target system supports an 80-bit long double type,
+/// and unavailable on Apple silicon.'''
 
 else:
     raise ValueError('Unhandled float type.')