Limit plumbed search pattern to its closing character

With this the search patterns in file locations now support the ctags
format. The end is marked by the next unescaped occurance of the first
character.

Author: xyb3rt

plugin/acme.vim

@@ -493,8 +493,12 @@ function s:Goto(pos)
 			exe 'normal!' col.'|'
 		endif
 	elseif a:pos =~ '^[/?]'
+		let [i, n] = [1, len(a:pos)]
+		while i < n && a:pos[i] != a:pos[0]
+			let i += 1 + (a:pos[i] == '\')
+		endwhile
 		exe 'normal!' (a:pos[0] == '/' ? 'gg' : 'G$')
-		call search(a:pos[1:], a:pos[0] == '?' ? 'b' : 'c')
+		call search(a:pos[1:i-1], a:pos[0] == '?' ? 'b' : 'c')
 	endif
 endfunc