[ObjC] Typos and comment improvements.
diff --git a/objectivec/GPBDescriptor.m b/objectivec/GPBDescriptor.m
index bb17813..c29b955 100644
--- a/objectivec/GPBDescriptor.m
+++ b/objectivec/GPBDescriptor.m
@@ -508,7 +508,8 @@
BOOL isMessage = GPBDataTypeIsMessage(dataType);
BOOL isMapOrArray = GPBFieldIsMapOrArray(self);
- // If proto3 optionals weren't know, compute the flag for the rest of the runtime.
+ // If proto3 optionals weren't known (i.e. generated code from an
+ // older version), compute the flag for the rest of the runtime.
if (!proto3OptionalKnown) {
// If it was...
// - proto3 syntax
@@ -530,7 +531,7 @@
// autocreation.
hasOrCountSel_ = SelFromStrings(NULL, coreDesc->name, "_Count", NO);
} else {
- // Know it is a single field; it gets has/setHas selectors if...
+ // It is a single field; it gets has/setHas selectors if...
// - not in a oneof (negative has index)
// - not clearing on zero
if ((coreDesc->hasIndex >= 0) &&
diff --git a/objectivec/GPBDescriptor_PackagePrivate.h b/objectivec/GPBDescriptor_PackagePrivate.h
index 467504f..b3d6730 100644
--- a/objectivec/GPBDescriptor_PackagePrivate.h
+++ b/objectivec/GPBDescriptor_PackagePrivate.h
@@ -155,9 +155,9 @@
// breaking change in the runtime.
GPBDescriptorInitializationFlag_UsesClassRefs = 1 << 2,
- // This flag is used to indicate that the generated sources already containg
+ // This flag is used to indicate that the generated sources already contain
// the `GPBFieldClearHasIvarOnZero` flag and it doesn't have to be computed
- // at startup, this allows older generated code to still work with the
+ // at startup. This allows older generated code to still work with the
// current runtime library.
GPBDescriptorInitializationFlag_Proto3OptionalKnown = 1 << 3,
};
diff --git a/objectivec/GPBUtilities.h b/objectivec/GPBUtilities.h
index 828fd16..75759b2 100644
--- a/objectivec/GPBUtilities.h
+++ b/objectivec/GPBUtilities.h
@@ -95,7 +95,7 @@
void GPBClearMessageField(GPBMessage *self, GPBFieldDescriptor *field);
/**
- * Clears the given onoof field for the given message.
+ * Clears the given oneof field for the given message.
*
* @param self The message for which to clear the field.
* @param oneof The oneof to clear.
