Fix hg heads -r flag documentation
The command arguments are "[-ac] [-r STARTREV] [REV]..."
# revision 0
adding copy
adding move
adding remove
adding unchanged
adding zzz1_merge_ok
adding zzz2_merge_bad
# revision 1
# local changes to revision 0
4 files updated, 0 files merged, 3 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
M zzz1_merge_ok
M zzz2_merge_bad
# local merge with bad merge tool
merging zzz1_merge_ok
merging zzz2_merge_bad
merging zzz2_merge_bad failed!
3 files updated, 1 files merged, 2 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
merging zzz1_merge_ok
merging zzz2_merge_bad
warning: conflicts during merge.
merging zzz2_merge_bad failed!
2 files updated, 1 files merged, 3 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
+=======
M zzz1_merge_ok
M zzz2_merge_bad
? zzz2_merge_bad.orig
# local merge with conflicts
merging zzz1_merge_ok
merging zzz2_merge_bad
warning: conflicts during merge.
merging zzz2_merge_bad failed!
3 files updated, 1 files merged, 2 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
merging zzz1_merge_ok
merging zzz2_merge_bad
warning: conflicts during merge.
merging zzz2_merge_bad failed!
2 files updated, 1 files merged, 3 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
--- a/zzz2_merge_bad
+++ b/zzz2_merge_bad
+another last line
+=======
+=======
+new last line
+=======
M zzz1_merge_ok
M zzz2_merge_bad
? zzz2_merge_bad.orig
# local merge without conflicts
merging zzz1_merge_ok
4 files updated, 1 files merged, 2 files removed, 0 files unresolved
--- a/zzz1_merge_ok
+++ b/zzz1_merge_ok
+new last line
M zzz1_merge_ok
? zzz2_merge_bad.orig