webapi.txt: fix grammatical error.

diff --git a/docs/frontends/webapi.txt b/docs/frontends/webapi.txt
index c96c33c8325e59256841142c080cbc2d6e585d3a..2f6891958f9526879037c934530489bc0b1feef3 100644 (file)
--- a/docs/frontends/webapi.txt
+++ b/docs/frontends/webapi.txt
@@ -735,7 +735,7 @@ GET /uri/$DIRCAP/[SUBDIRS../]FILENAME?t=json
      operating system).
 
   3. You might be confused by the fact that changing the contents of a
-     mutable file in Tahoe don't have any effect on any links pointing at
+     mutable file in Tahoe doesn't have any effect on any links pointing at
      that file in any directories, although "tahoe backup" sets the link
      'ctime'/'mtime' to reflect timestamps about the local file corresponding
      to the Tahoe file to which the link points.