Fix typos (#595)

This is a trial patch to fix the typos

Signed-off-by: SZ Lin (林上智) <szlin@debian.org>

nnn.1

@@ -428,7 +428,7 @@ separated by \fI;\fR:
     export NNN_FIFO='/tmp/nnn.fifo'
 
     NOTES:
-    1. Overriden by a temporary path with -a option.
+    1. Overridden by a temporary path with -a option.
     2. If the FIFO file doesn't exist it will be created, but not removed (unless it is generated by -a option).
 .Ed
 .Pp

plugins/nuke

@@ -312,7 +312,7 @@ handle_multimedia() {
                 # convert -- "${FPATH}" -auto-orient "${IMAGE_CACHE_PATH}" && exit 6
             # fi
 
-            ## `w3mimgdisplay` will be called for all images (unless overriden
+            ## `w3mimgdisplay` will be called for all images (unless overridden
             ## as above), but might fail for unsupported types.
             exit 7;;