CLEANUP: assorted typo fixes in the code and comments

This is fifth iteration of typo fixes
diff --git a/contrib/spoa_example/include/spoe_types.h b/contrib/spoa_example/include/spoe_types.h
index 8f93edd..a986227 100644
--- a/contrib/spoa_example/include/spoe_types.h
+++ b/contrib/spoa_example/include/spoe_types.h
@@ -100,7 +100,7 @@
 	SPOE_CTX_ERRS,
 };
 
-/* Errors triggerd by SPOE applet */
+/* Errors triggered by SPOE applet */
 enum spoe_frame_error {
 	SPOE_FRM_ERR_NONE = 0,
 	SPOE_FRM_ERR_IO,
diff --git a/contrib/spoa_example/spoa.c b/contrib/spoa_example/spoa.c
index f32ac44..dd4a873 100644
--- a/contrib/spoa_example/spoa.c
+++ b/contrib/spoa_example/spoa.c
@@ -246,7 +246,7 @@
 	DEBUG(frame->worker, "<%lu> Supported versions : %.*s",
 	      frame->client->id, (int)sz, str);
 
-	/* TODO: Find the right verion in supported ones */
+	/* TODO: Find the right version in supported ones */
 
 	ret  = (p - *buf);
 	*buf = p;