test: use `printenv.py --line` in `test-https.t`

This makes the output easier to update and read.

tests/test-https.t

@@ -207,7 +207,7 b' pull without cacert'
   $ cd copy-pull
   $ cat >> .hg/hgrc <<EOF
   > [hooks]
-  > changegroup = sh -c "printenv.py changegroup"
+  > changegroup = sh -c "printenv.py --line changegroup"
   > EOF
   $ hg pull $DISABLECACERTS
   pulling from https://localhost:$HGPORT/
@@ -226,7 +226,14 b' pull without cacert'
   adding file changes
   added 1 changesets with 1 changes to 1 files
   new changesets 5fed3813f7f5
-  changegroup hook: HG_HOOKNAME=changegroup HG_HOOKTYPE=changegroup HG_NODE=5fed3813f7f5e1824344fdc9cf8f63bb662c292d HG_NODE_LAST=5fed3813f7f5e1824344fdc9cf8f63bb662c292d HG_SOURCE=pull HG_TXNID=TXN:$ID$ HG_URL=https://localhost:$HGPORT/
+  changegroup hook: HG_HOOKNAME=changegroup
+  HG_HOOKTYPE=changegroup
+  HG_NODE=5fed3813f7f5e1824344fdc9cf8f63bb662c292d
+  HG_NODE_LAST=5fed3813f7f5e1824344fdc9cf8f63bb662c292d
+  HG_SOURCE=pull
+  HG_TXNID=TXN:$ID$
+  HG_URL=https://localhost:$HGPORT/
+  
   (run 'hg update' to get a working copy)
   $ cd ..