Add corner case tests for diff-index and diff-files

diff --git a/Documentation/git-instaweb.txt b/Documentation/git-instaweb.txt
index 735008c1ab172cda93e6f98b75b401c37f1cd22f..51f1532ef7ce34786ec0dcae32b9e60b710cc9c4 100644 (file)
--- a/Documentation/git-instaweb.txt
+++ b/Documentation/git-instaweb.txt
@@ -38,10 +38,11 @@ OPTIONS
        The port number to bind the httpd to.  (Default: 1234)
 
 -b|--browser::
-
-       The web browser command-line to execute to view the gitweb page.
-       If blank, the URL of the gitweb instance will be printed to
-       stdout.  (Default: 'firefox')
+       The web browser that should be used to view the gitweb
+       page. This will be passed to the 'git-web--browse' helper
+       script along with the URL of the gitweb instance. See
+       linkgit:git-web--browse[1] for more information about this. If
+       the script fails, the URL will be printed to stdout.
 
 --start::
        Start the httpd instance and exit.  This does not generate
@@ -71,6 +72,10 @@ You may specify configuration in your .git/config
 
 -----------------------------------------------------------------------
 
+If the configuration variable 'instaweb.browser' is not set,
+'web.browser' will be used instead if it is defined. See
+linkgit:git-web--browse[1] for more information about this.
+
 Author
 ------
 Written by Eric Wong <normalperson@yhbt.net>
@@ -81,4 +86,4 @@ Documentation by Eric Wong <normalperson@yhbt.net>.
 
 GIT
 ---
-Part of the gitlink:git[7] suite
+Part of the linkgit:git[7] suite