[PATCH v3 15/16] help: move git-diff and git-reset to different groups

The third column in command-list.txt determines what group a common command is printed in 'git help'.

"git reset" is currently in the "work on the current change (see also: git help everyday)" group. While it's true that "git reset" can manipulate the index and can be in this group, its unique functionality is resetting HEAD, which should be the "grow, mark, tweak history" group.

Moving it there will also avoid the confusion because both 'restore' and 'reset' are in the same group, next to each other.

While looking at the 'group, mark, tweak history', I realize "git diff" should not be there. All the commands in this group is about _changing_ the commit history while "git diff" is a read-only operation. It fits better in the "examine the history and state" group (especially when "git status", its close friend, is already there).

This is what we have after the reorganization:

    work on the current change (see also: git help everyday)
       add       Add file contents to the index
       mv        Move or rename a file, a directory, or a symlink
       restore   Restore working tree files
       rm        Remove files from the working tree and from the index

    examine the history and state (see also: git help revisions)
       bisect    Use binary search to find the commit that introduced a bug
       diff      Show changes between commits, commit and working tree, etc
       grep      Print lines matching a pattern
       log       Show commit logs
       show      Show various types of objects
       status    Show the working tree status

    grow, mark and tweak your common history
       branch    List, create, or delete branches
       commit    Record changes to the repository
       merge     Join two or more development histories together
       rebase    Reapply commits on top of another base tip
       reset     Reset current HEAD to the specified state
       switch    Switch branches
       tag       Create, list, delete or verify a tag object signed with GPG

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 command-list.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)