fix: use getline('.') in s:RightRelease for correct plumbing

Using expand('<cWORD>') in s:RightRelease meant that s:Open received only
a single word, but still with the absolute column index of the mouse
click. This caused regex column matches in s:Match to fail silently.

By using getline('.'), s:Open receives the full line, ensuring that
column-based plumbing patterns (like URL detection) work correctly when
right-clicking.

Author: mcepl

plugin/acme.vim

@@ -1057,7 +1057,7 @@ function s:RightRelease(click)
 	if !has('nvim')
 		exe "normal! \<LeftRelease>"
 	endif
-	let cmd = a:click <= 0 || s:clicksel ? s:Sel()[0] : expand('<cWORD>')
+	let cmd = a:click <= 0 || s:clicksel ? s:Sel()[0] : getline('.')
 	let vis = s:clickmode == 'v' && (a:click <= 0 || !s:clicksel)
 	call s:RestVisual(s:visual)
 	let w = win_getid()