This PR addresses an off-by-one error in wrd:offset. Previously, if M-c were used on a non-alphanumeric character and there were no alphanumeric characters between the position of the cursor and the end of the buffer, wrd:offset would increment its counter to a value one greater than the remaining length of the buffer. As a result, this +snag call in /lib/sole would fail due to its using an out-of-bounds index, causing Dojo to crash and unlink:

This fix corrects the issue by modifying wrd to check if the next character is null (i.e. the end of the buffer) and if so to return the current value of the counter rather than incrementing, preventing the off-by-one error and resultant crash.

Resolves #6864