docs: fix "delimeter" typo in fprocopen man page

proc/fprocopen.3

@@ -48,13 +48,13 @@ the beginning of the file.
 .BR w [ <del> ]
 Open a file below
 .I /proc/##
-for writing even large buffers.  The optional delimeter character
+for writing even large buffers.  The optional delimiter character
 can be one of the follwoing
 .BR '\ ' ,\  ',' ,\  '.' ,\ and\  ':'
 where the default is the colon
 .BR ',' .
 This allows to split very large input lines into pieces at this
-delimeter and write each of them to the opened file below
+delimiter and write each of them to the opened file below
 .IR /proc/## .
 .TP
 .B e