fix typo 'comleption' -> 'completion'

doc/classes/CodeEdit.xml

@@ -448,7 +448,7 @@
 		<member name="code_completion_enabled" type="bool" setter="set_code_completion_enabled" getter="is_code_completion_enabled" default="false">
 			Sets whether code completion is allowed.
 		</member>
-		<member name="code_completion_prefixes" type="String[]" setter="set_code_completion_prefixes" getter="get_code_comletion_prefixes" default="[]">
+		<member name="code_completion_prefixes" type="String[]" setter="set_code_completion_prefixes" getter="get_code_completion_prefixes" default="[]">
 			Sets prefixes that will trigger code completion.
 		</member>
 		<member name="delimiter_comments" type="String[]" setter="set_comment_delimiters" getter="get_comment_delimiters" default="[]">

scene/gui/code_edit.cpp

@@ -2338,7 +2338,7 @@ void CodeEdit::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("is_code_completion_enabled"), &CodeEdit::is_code_completion_enabled);
 
 	ClassDB::bind_method(D_METHOD("set_code_completion_prefixes", "prefixes"), &CodeEdit::set_code_completion_prefixes);
-	ClassDB::bind_method(D_METHOD("get_code_comletion_prefixes"), &CodeEdit::get_code_completion_prefixes);
+	ClassDB::bind_method(D_METHOD("get_code_completion_prefixes"), &CodeEdit::get_code_completion_prefixes);
 
 	// Overridable
 
@@ -2382,7 +2382,7 @@ void CodeEdit::_bind_methods() {
 
 	ADD_GROUP("Code Completion", "code_completion_");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "code_completion_enabled"), "set_code_completion_enabled", "is_code_completion_enabled");
-	ADD_PROPERTY(PropertyInfo(Variant::PACKED_STRING_ARRAY, "code_completion_prefixes"), "set_code_completion_prefixes", "get_code_comletion_prefixes");
+	ADD_PROPERTY(PropertyInfo(Variant::PACKED_STRING_ARRAY, "code_completion_prefixes"), "set_code_completion_prefixes", "get_code_completion_prefixes");
 
 	ADD_GROUP("Indentation", "indent_");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "indent_size"), "set_indent_size", "get_indent_size");