cmdrewrite: use context manager for some locks and transactions
These were the trivial cases where I didn't even need to extend the
scope of a transaction or change indentation to fix it.
import hghave
@hghave.check("docgraph-ext", "Extension to generate graph from repository")
def docgraph():
try:
import hgext.docgraph
hgext.docgraph.cmdtable # trigger import
except ImportError:
try:
import hgext3rd.docgraph
hgext3rd.docgraph.cmdtable # trigger import
except ImportError:
return False
return True