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

This makes the output easier to update and read.

tests/test-ssh.t

@@ -36,7 +36,7 b' configure for serving'
   > uncompressed = True
   > 
   > [hooks]
-  > changegroup = sh -c "printenv.py changegroup-in-remote 0 ../dummylog"
+  > changegroup = sh -c "printenv.py --line changegroup-in-remote 0 ../dummylog"
   > EOF
   $ cd $TESTTMP
 
@@ -563,7 +563,15 b' debug output'
   Got arguments 1:user@dummy 2:hg -R local serve --stdio
   Got arguments 1:user@dummy 2:hg -R $TESTTMP/local serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
-  changegroup-in-remote hook: HG_BUNDLE2=1 HG_HOOKNAME=changegroup HG_HOOKTYPE=changegroup HG_NODE=a28a9d1a809cab7d4e2fde4bee738a9ede948b60 HG_NODE_LAST=a28a9d1a809cab7d4e2fde4bee738a9ede948b60 HG_SOURCE=serve HG_TXNID=TXN:$ID$ HG_URL=remote:ssh:$LOCALIP
+  changegroup-in-remote hook: HG_BUNDLE2=1
+  HG_HOOKNAME=changegroup
+  HG_HOOKTYPE=changegroup
+  HG_NODE=a28a9d1a809cab7d4e2fde4bee738a9ede948b60
+  HG_NODE_LAST=a28a9d1a809cab7d4e2fde4bee738a9ede948b60
+  HG_SOURCE=serve
+  HG_TXNID=TXN:$ID$
+  HG_URL=remote:ssh:$LOCALIP
+  
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
@@ -573,9 +581,25 b' debug output'
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
-  changegroup-in-remote hook: HG_BUNDLE2=1 HG_HOOKNAME=changegroup HG_HOOKTYPE=changegroup HG_NODE=1383141674ec756a6056f6a9097618482fe0f4a6 HG_NODE_LAST=1383141674ec756a6056f6a9097618482fe0f4a6 HG_SOURCE=serve HG_TXNID=TXN:$ID$ HG_URL=remote:ssh:$LOCALIP
+  changegroup-in-remote hook: HG_BUNDLE2=1
+  HG_HOOKNAME=changegroup
+  HG_HOOKTYPE=changegroup
+  HG_NODE=1383141674ec756a6056f6a9097618482fe0f4a6
+  HG_NODE_LAST=1383141674ec756a6056f6a9097618482fe0f4a6
+  HG_SOURCE=serve
+  HG_TXNID=TXN:$ID$
+  HG_URL=remote:ssh:$LOCALIP
+  
   Got arguments 1:user@dummy 2:chg -R remote serve --stdio (chg !)
-  changegroup-in-remote hook: HG_BUNDLE2=1 HG_HOOKNAME=changegroup HG_HOOKTYPE=changegroup HG_NODE=1383141674ec756a6056f6a9097618482fe0f4a6 HG_NODE_LAST=1383141674ec756a6056f6a9097618482fe0f4a6 HG_SOURCE=serve HG_TXNID=TXN:$ID$ HG_URL=remote:ssh:$LOCALIP (chg !)
+  changegroup-in-remote hook: HG_BUNDLE2=1 (chg !)
+  HG_HOOKNAME=changegroup (chg !)
+  HG_HOOKTYPE=changegroup (chg !)
+  HG_NODE=1383141674ec756a6056f6a9097618482fe0f4a6 (chg !)
+  HG_NODE_LAST=1383141674ec756a6056f6a9097618482fe0f4a6 (chg !)
+  HG_SOURCE=serve (chg !)
+  HG_TXNID=TXN:$ID$ (chg !)
+  HG_URL=remote:ssh:$LOCALIP (chg !)
+   (chg !)
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
   Got arguments 1:user@dummy 2:hg init 'a repo'
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
@@ -583,9 +607,18 b' debug output'
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
   Got arguments 1:user@dummy 2:hg -R 'a repo' serve --stdio
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
-  changegroup-in-remote hook: HG_BUNDLE2=1 HG_HOOKNAME=changegroup HG_HOOKTYPE=changegroup HG_NODE=65c38f4125f9602c8db4af56530cc221d93b8ef8 HG_NODE_LAST=65c38f4125f9602c8db4af56530cc221d93b8ef8 HG_SOURCE=serve HG_TXNID=TXN:$ID$ HG_URL=remote:ssh:$LOCALIP
+  changegroup-in-remote hook: HG_BUNDLE2=1
+  HG_HOOKNAME=changegroup
+  HG_HOOKTYPE=changegroup
+  HG_NODE=65c38f4125f9602c8db4af56530cc221d93b8ef8
+  HG_NODE_LAST=65c38f4125f9602c8db4af56530cc221d93b8ef8
+  HG_SOURCE=serve
+  HG_TXNID=TXN:$ID$
+  HG_URL=remote:ssh:$LOCALIP
+  
   Got arguments 1:user@dummy 2:hg -R remote serve --stdio
 
+
 remote hook failure is attributed to remote
 
   $ cat > $TESTTMP/failhook << EOF