tests: work around differing hunk headers between GNU and Solaris diff

The hunk headers specifying what lines the hunk apply to differ.  They're
irrelevant to the test, so just eliminate them from the output.

tests/test-command-template.t

@@ -120,52 +120,32 b' as default style, except for extra phase'
   $ hg log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log -T phases > phases.out
-  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+'
-  @@ -2,0 +3 @@
+  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +phase:       draft
-  @@ -6,0 +8 @@
   +phase:       draft
-  @@ -11,0 +14 @@
   +phase:       draft
-  @@ -17,0 +21 @@
   +phase:       draft
-  @@ -24,0 +29 @@
   +phase:       draft
-  @@ -31,0 +37 @@
   +phase:       draft
-  @@ -36,0 +43 @@
   +phase:       draft
-  @@ -41,0 +49 @@
   +phase:       draft
-  @@ -46,0 +55 @@
   +phase:       draft
-  @@ -51,0 +61 @@
   +phase:       draft
 
   $ hg log -v > log.out
   $ hg log -v --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg log -v -T phases > phases.out
-  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+'
-  @@ -2,0 +3 @@
+  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +phase:       draft
-  @@ -7,0 +9 @@
   +phase:       draft
-  @@ -15,0 +18 @@
   +phase:       draft
-  @@ -24,0 +28 @@
   +phase:       draft
-  @@ -33,0 +38 @@
   +phase:       draft
-  @@ -43,0 +49 @@
   +phase:       draft
-  @@ -50,0 +57 @@
   +phase:       draft
-  @@ -58,0 +66 @@
   +phase:       draft
-  @@ -66,0 +75 @@
   +phase:       draft
-  @@ -77,0 +87 @@
   +phase:       draft
 
   $ hg log -q > log.out
@@ -212,52 +192,32 b' Default style should also preserve color'
   $ hg --color=debug log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug log -T phases > phases.out
-  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+'
-  @@ -2,0 +3 @@
+  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +[log.phase|phase:       draft]
-  @@ -6,0 +8 @@
   +[log.phase|phase:       draft]
-  @@ -11,0 +14 @@
   +[log.phase|phase:       draft]
-  @@ -17,0 +21 @@
   +[log.phase|phase:       draft]
-  @@ -24,0 +29 @@
   +[log.phase|phase:       draft]
-  @@ -31,0 +37 @@
   +[log.phase|phase:       draft]
-  @@ -36,0 +43 @@
   +[log.phase|phase:       draft]
-  @@ -41,0 +49 @@
   +[log.phase|phase:       draft]
-  @@ -46,0 +55 @@
   +[log.phase|phase:       draft]
-  @@ -51,0 +61 @@
   +[log.phase|phase:       draft]
 
   $ hg --color=debug -v log > log.out
   $ hg --color=debug -v log --style default > style.out
   $ cmp log.out style.out || diff -u log.out style.out
   $ hg --color=debug -v log -T phases > phases.out
-  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+'
-  @@ -2,0 +3 @@
+  $ diff -U 0 log.out phases.out | egrep -v '^---|^\+\+\+|^@@'
   +[log.phase|phase:       draft]
-  @@ -7,0 +9 @@
   +[log.phase|phase:       draft]
-  @@ -15,0 +18 @@
   +[log.phase|phase:       draft]
-  @@ -24,0 +28 @@
   +[log.phase|phase:       draft]
-  @@ -33,0 +38 @@
   +[log.phase|phase:       draft]
-  @@ -43,0 +49 @@
   +[log.phase|phase:       draft]
-  @@ -50,0 +57 @@
   +[log.phase|phase:       draft]
-  @@ -58,0 +66 @@
   +[log.phase|phase:       draft]
-  @@ -66,0 +75 @@
   +[log.phase|phase:       draft]
-  @@ -77,0 +87 @@
   +[log.phase|phase:       draft]
 
   $ hg --color=debug -q log > log.out