merge: add instructions to the commit message when editing

Before f824628 (merge: use editor by default in interactive sessions,
2012-01-10), git-merge only started an editor if the user explicitly
asked for it with --edit.  Thus it seemed unlikely that the user would
need extra guidance.

After f824628 the _normal_ thing is to start an editor.  Give at least
an indication of why we are doing it.

The sentence about justification is one of the few things about
standard git that are not agnostic to the workflow that the user
chose.  However, f824628 was proposed by Linus specifically to
discourage users from merging unrelated upstream progress into topic
branches.  So we may as well take another step in the same direction.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 file changed
tree: d935aef25ff4e5fee78f373108da9ad396993b86
  1. block-sha1/
  2. builtin/
  3. compat/
  4. contrib/
  5. Documentation/
  6. git-gui/
  7. git_remote_helpers/
  8. gitk-git/
  9. gitweb/
  10. mergetools/
  11. perl/
  12. po/
  13. ppc/
  14. t/
  15. templates/
  16. vcs-svn/
  17. xdiff/
  18. .gitattributes
  19. .gitignore
  20. .mailmap
  21. abspath.c
  22. aclocal.m4
  23. advice.c
  24. advice.h
  25. alias.c
  26. alloc.c
  27. archive-tar.c
  28. archive-zip.c
  29. archive.c
  30. archive.h
  31. argv-array.c
  32. argv-array.h
  33. attr.c
  34. attr.h
  35. base85.c
  36. bisect.c
  37. bisect.h
  38. blob.c
  39. blob.h
  40. branch.c
  41. branch.h
  42. builtin.h
  43. bulk-checkin.c
  44. bulk-checkin.h
  45. bundle.c
  46. bundle.h
  47. cache-tree.c
  48. cache-tree.h
  49. cache.h
  50. check-builtins.sh
  51. check-racy.c
  52. check_bindir
  53. color.c
  54. color.h
  55. combine-diff.c
  56. command-list.txt
  57. commit.c
  58. commit.h
  59. config.c
  60. config.mak.in
  61. configure.ac
  62. connect.c
  63. connected.c
  64. connected.h
  65. convert.c
  66. convert.h
  67. copy.c
  68. COPYING
  69. credential-cache--daemon.c
  70. credential-cache.c
  71. credential-store.c
  72. credential.c
  73. credential.h
  74. csum-file.c
  75. csum-file.h
  76. ctype.c
  77. daemon.c
  78. date.c
  79. decorate.c
  80. decorate.h
  81. delta.h
  82. diff-delta.c
  83. diff-lib.c
  84. diff-no-index.c
  85. diff.c
  86. diff.h
  87. diffcore-break.c
  88. diffcore-delta.c
  89. diffcore-order.c
  90. diffcore-pickaxe.c
  91. diffcore-rename.c
  92. diffcore.h
  93. dir.c
  94. dir.h
  95. editor.c
  96. entry.c
  97. environment.c
  98. exec_cmd.c
  99. exec_cmd.h
  100. fast-import.c
  101. fetch-pack.h
  102. fixup-builtins
  103. fmt-merge-msg.h
  104. fsck.c
  105. fsck.h
  106. generate-cmdlist.sh
  107. gettext.c
  108. gettext.h
  109. git-add--interactive.perl
  110. git-am.sh
  111. git-archimport.perl
  112. git-bisect.sh
  113. git-compat-util.h
  114. git-cvsexportcommit.perl
  115. git-cvsimport.perl
  116. git-cvsserver.perl
  117. git-difftool--helper.sh
  118. git-difftool.perl
  119. git-filter-branch.sh
  120. git-instaweb.sh
  121. git-lost-found.sh
  122. git-merge-octopus.sh
  123. git-merge-one-file.sh
  124. git-merge-resolve.sh
  125. git-mergetool--lib.sh
  126. git-mergetool.sh
  127. git-parse-remote.sh
  128. git-pull.sh
  129. git-quiltimport.sh
  130. git-rebase--am.sh
  131. git-rebase--interactive.sh
  132. git-rebase--merge.sh
  133. git-rebase.sh
  134. git-relink.perl
  135. git-remote-testgit.py
  136. git-repack.sh
  137. git-request-pull.sh
  138. git-send-email.perl
  139. git-sh-i18n.sh
  140. git-sh-setup.sh
  141. git-stash.sh
  142. git-submodule.sh
  143. git-svn.perl
  144. GIT-VERSION-GEN
  145. git-web--browse.sh
  146. git.c
  147. git.spec.in
  148. gpg-interface.c
  149. gpg-interface.h
  150. graph.c
  151. graph.h
  152. grep.c
  153. grep.h
  154. hash.c
  155. hash.h
  156. help.c
  157. help.h
  158. hex.c
  159. http-backend.c
  160. http-fetch.c
  161. http-push.c
  162. http-walker.c
  163. http.c
  164. http.h
  165. ident.c
  166. imap-send.c
  167. INSTALL
  168. kwset.c
  169. kwset.h
  170. levenshtein.c
  171. levenshtein.h
  172. LGPL-2.1
  173. list-objects.c
  174. list-objects.h
  175. ll-merge.c
  176. ll-merge.h
  177. lockfile.c
  178. log-tree.c
  179. log-tree.h
  180. mailmap.c
  181. mailmap.h
  182. Makefile
  183. match-trees.c
  184. merge-file.c
  185. merge-file.h
  186. merge-recursive.c
  187. merge-recursive.h
  188. name-hash.c
  189. notes-cache.c
  190. notes-cache.h
  191. notes-merge.c
  192. notes-merge.h
  193. notes.c
  194. notes.h
  195. object.c
  196. object.h
  197. pack-check.c
  198. pack-refs.c
  199. pack-refs.h
  200. pack-revindex.c
  201. pack-revindex.h
  202. pack-write.c
  203. pack.h
  204. pager.c
  205. parse-options-cb.c
  206. parse-options.c
  207. parse-options.h
  208. patch-delta.c
  209. patch-ids.c
  210. patch-ids.h
  211. path.c
  212. pkt-line.c
  213. pkt-line.h
  214. preload-index.c
  215. pretty.c
  216. progress.c
  217. progress.h
  218. prompt.c
  219. prompt.h
  220. quote.c
  221. quote.h
  222. reachable.c
  223. reachable.h
  224. read-cache.c
  225. README
  226. reflog-walk.c
  227. reflog-walk.h
  228. refs.c
  229. refs.h
  230. remote-curl.c
  231. remote.c
  232. remote.h
  233. replace_object.c
  234. rerere.c
  235. rerere.h
  236. resolve-undo.c
  237. resolve-undo.h
  238. revision.c
  239. revision.h
  240. run-command.c
  241. run-command.h
  242. send-pack.h
  243. sequencer.c
  244. sequencer.h
  245. server-info.c
  246. setup.c
  247. sh-i18n--envsubst.c
  248. sha1-array.c
  249. sha1-array.h
  250. sha1-lookup.c
  251. sha1-lookup.h
  252. sha1_file.c
  253. sha1_name.c
  254. shallow.c
  255. shell.c
  256. shortlog.h
  257. show-index.c
  258. sideband.c
  259. sideband.h
  260. sigchain.c
  261. sigchain.h
  262. strbuf.c
  263. strbuf.h
  264. streaming.c
  265. streaming.h
  266. string-list.c
  267. string-list.h
  268. submodule.c
  269. submodule.h
  270. symlinks.c
  271. tag.c
  272. tag.h
  273. tar.h
  274. test-chmtime.c
  275. test-credential.c
  276. test-ctype.c
  277. test-date.c
  278. test-delta.c
  279. test-dump-cache-tree.c
  280. test-genrandom.c
  281. test-index-version.c
  282. test-line-buffer.c
  283. test-match-trees.c
  284. test-mktemp.c
  285. test-obj-pool.c
  286. test-parse-options.c
  287. test-path-utils.c
  288. test-run-command.c
  289. test-scrap-cache-tree.c
  290. test-sha1.c
  291. test-sha1.sh
  292. test-sigchain.c
  293. test-string-pool.c
  294. test-subprocess.c
  295. test-svn-fe.c
  296. test-treap.c
  297. thread-utils.c
  298. thread-utils.h
  299. trace.c
  300. transport-helper.c
  301. transport.c
  302. transport.h
  303. tree-diff.c
  304. tree-walk.c
  305. tree-walk.h
  306. tree.c
  307. tree.h
  308. unimplemented.sh
  309. unix-socket.c
  310. unix-socket.h
  311. unpack-trees.c
  312. unpack-trees.h
  313. upload-pack.c
  314. url.c
  315. url.h
  316. usage.c
  317. userdiff.c
  318. userdiff.h
  319. utf8.c
  320. utf8.h
  321. walker.c
  322. walker.h
  323. wrap-for-bin.sh
  324. wrapper.c
  325. write_or_die.c
  326. ws.c
  327. wt-status.c
  328. wt-status.h
  329. xdiff-interface.c
  330. xdiff-interface.h
  331. zlib.c