git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/Documentation/git-instaweb.txt b/Documentation/git-instaweb.txt
index 841e8fac7fd61f8e5250c1747935156c93999394..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
@@ -72,7 +73,8 @@ 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.
+'web.browser' will be used instead if it is defined. See
+linkgit:git-web--browse[1] for more information about this.
 
 Author
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