t4017 (diff-retval): replace manual exit code check with test_expect_code

diff --git a/Documentation/git-mergetool--lib.txt b/Documentation/git-mergetool--lib.txt
index 3d57031d78d9e274890ab2264adcbc95980646d0..d8df55362ce653516006b02df2950c325f1176b7 100644 (file)
--- a/Documentation/git-mergetool--lib.txt
+++ b/Documentation/git-mergetool--lib.txt
@@ -1,5 +1,5 @@
-git-mergetool--lib(1)
-=====================
+git-mergetool{litdd}lib(1)
+==========================
 
 NAME
 ----
@@ -7,7 +7,7 @@ git-mergetool--lib - Common git merge tool shell scriptlets
 
 SYNOPSIS
 --------
-'. "$(git --exec-path)/git-mergetool--lib"'
+'TOOL_MODE=(diff|merge) . "$(git --exec-path)/git-mergetool--lib"'
 
 DESCRIPTION
 -----------
@@ -16,18 +16,18 @@ This is not a command the end user would want to run.  Ever.
 This documentation is meant for people who are studying the
 Porcelain-ish scripts and/or are writing new ones.
 
-The 'git-mergetool--lib' scriptlet is designed to be sourced (using
+The 'git-mergetool{litdd}lib' scriptlet is designed to be sourced (using
 `.`) by other shell scripts to set up functions for working
 with git merge tools.
 
-Before sourcing it, your script should set up a few variables;
-`TOOL_MODE` is used to define the operation mode for various
-functions.  'diff' and 'merge' are valid values.
+Before sourcing 'git-mergetool{litdd}lib', your script must set `TOOL_MODE`
+to define the operation mode for the functions listed below.
+'diff' and 'merge' are valid values.
 
 FUNCTIONS
 ---------
 get_merge_tool::
-       returns a merge tool
+       returns a merge tool.
 
 get_merge_tool_cmd::
        returns the custom command for a merge tool.
@@ -38,10 +38,8 @@ get_merge_tool_path::
 run_merge_tool::
        launches a merge tool given the tool name and a true/false
        flag to indicate whether a merge base is present.
-       '$merge_tool', '$merge_tool_path', and for custom commands,
-       '$merge_tool_cmd', must be defined prior to calling
-       run_merge_tool.  Additionally, '$MERGED', '$LOCAL', '$REMOTE',
-       and '$BASE' must be defined for use by the merge tool.
+       '$MERGED', '$LOCAL', '$REMOTE', and '$BASE' must be defined
+       for use by the merge tool.
 
 Author
 ------