[Clang][Sema] Added space after ',' in a warning

[fahadnayyar]

Summary

This change fixes a typo in a warning message.

rdar://79707705

[egorzhdan]

LGTM, thanks!

[egorzhdan]

Merged: https://reviews.llvm.org/rGcdfb65e5e7182a02005b3611aa28288890b9e296

clang/include/clang/Basic/DiagnosticSemaKinds.td

 def warn_objc_readonly_property_has_setter : Warning<
     "setter cannot be specified for a readonly property">,
     InGroup<ObjCReadonlyPropertyHasSetter>;
 def warn_atomic_property_rule : Warning<
   "writable atomic property %0 cannot pair a synthesized %select{getter|setter}1 "
   "with a user defined %select{getter|setter}2">,
   InGroup<DiagGroup<"atomic-property-with-user-defined-accessor">>;
 def note_atomic_property_fixup_suggest : Note<"setter and getter must both be "
-  "synthesized, or both be user defined,or the property must be nonatomic">;
+  "synthesized, or both be user defined, or the property must be nonatomic">;
 def err_atomic_property_nontrivial_assign_op : Error<
   "atomic property of reference type %0 cannot have non-trivial assignment"
   " operator">;
 def warn_cocoa_naming_owned_rule : Warning<
   "property follows Cocoa naming"
   " convention for returning 'owned' objects">,
   InGroup<DiagGroup<"objc-property-matches-cocoa-ownership-rule">>;
 def err_cocoa_naming_owned_rule : Error<

clang/test/SemaObjC/atomic-property-synthesis-rules.m

@interface Foo
     /*   34 */    int Get_Nonatomic_ReadWriteInExt_NoSynthesize;
     /*   34 */    int Set_Nonatomic_ReadWriteInExt_NoSynthesize;
     /*    4 */    int None_Nonatomic_ReadWriteInExt_NoSynthesize;
 }
 
 // read-write - might warn
 @property int GetSet;
 @property int Get;  // expected-note {{property declared here}} \
-                        // expected-note {{setter and getter must both be synthesized}}
+                        // expected-note {{setter and getter must both be synthesized, or both be user defined, or the property must be nonatomic}}
 @property int Set;  // expected-note {{property declared here}} \
                         // expected-note {{setter and getter must both be synthesized}}
 @property int None;
 @property(nonatomic) int GetSet_Nonatomic;
 @property(nonatomic) int Get_Nonatomic;
 @property(nonatomic) int Set_Nonatomic;
 @property(nonatomic) int None_Nonatomic;