doc: use correct cross reference in help documentation
This patch fixes problems below:
- ":hg:" role should be followed by not '"' but '`'
- there is a help topic not "default-push" but "config.default-push"
--- a/hgext/histedit.py Mon Feb 01 22:06:35 2016 +0900
+++ b/hgext/histedit.py Mon Feb 01 22:13:57 2016 +0900
@@ -892,7 +892,7 @@
- Specify ANCESTOR directly
- Use --outgoing -- it will be the first linear changeset not
- included in destination. (See :hg:"help default-push")
+ included in destination. (See :hg:`help config.default-push`)
- Otherwise, the value from the "histedit.defaultrev" config option
is used as a revset to select the base revision when ANCESTOR is not