help: refer ":merge3" instead of "internal:merge3"
According to warning message (introduced by
38e0363dcbe0) in
filemerge.py, the former should be used as official name.
help: use "hg files" instead of "hg locate" in "hg help filesets"
The latter command is already deprecated.
files: refer "hg help filesets" instead of "hg help revsets" in help text
"specifying FILE patterns" should refer the former.