Linux:exmacs: diff or compare

                          Move around      |      Toggle features      |        Manipulate
                    =====================|===========================|=============================
                    p,DEL -previous diff |     | -vert/horiz split   |a/b -copy A/B's region to B/A
                    n,SPC -next diff     |     h -hilighting         | rx -restore buf X's old diff
                        j -jump to diff  |     @ -auto-refinement    |  * -refine current region
                       gx -goto X's point|                           |  ! -update diff regions
                      C-l -recenter      |    ## -ignore whitespace  |
                      v/V -scroll up/dn  | #f/#h -focus/hide regions | wx -save buf X
                       -scroll lt/rt  |     X -read-only in buf X | wd -save diff output
                        ~ -swap variants |     m -wide display       |
                    =====================|===========================|=============================
                        R -show registry |     = -compare regions    |  M   -show session group
                        D -diff output   |     E -browse Ediff manual|  G   -send bug report
                        i -status info   |     ? -help off           |  z/q -suspend/quit
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                    For help on a specific command:  Click Button 2 over it; or
                                                       Put the cursor over it and type RET.