[PATCH v1 0/2] tr2: shows the scope unconditionally with config

From: Teng Long <dyroneteng@gmail.com>

Changes since the initial patch:

1. [1/2] optimize the "scope" field representation with real syntax and
concrete value.

Thanks.

Teng Long (2):
  api-trace2.txt: print config key-value pair
  tr2: shows scope unconditionally in addition to key-value pair

 Documentation/technical/api-trace2.txt | 41 ++++++++++++++++++++++++++
 trace2/tr2_tgt_event.c                 |  3 ++
 trace2/tr2_tgt_normal.c                |  5 +++-
 trace2/tr2_tgt_perf.c                  |  9 ++++--
 4 files changed, 55 insertions(+), 3 deletions(-)

Range-diff against v0:
1:  bebd97c832 ! 1:  32f8b9ae6b api-trace2.txt: print config key-value pair
    @@ Commit message
         Signed-off-by: Teng Long <dyroneteng@gmail.com>
     
      ## Documentation/technical/api-trace2.txt ##
    +@@ Documentation/technical/api-trace2.txt: The "exec_id" field is a command-unique id and is only useful if the
    + {
    + 	"event":"def_param",
    + 	...
    ++	"scope":"global",
    + 	"param":"core.abbrev",
    + 	"value":"7"
    + }
     @@ Documentation/technical/api-trace2.txt: at offset 508.
      This example also shows that thread names are assigned in a racy manner
      as each thread starts and allocates TLS storage.
2:  2f8fce6599 ! 2:  78575cca0b tr2: shows scope unconditionally in addition to key-value pair
    @@ Commit message
         Signed-off-by: Teng Long <dyroneteng@gmail.com>
     
      ## Documentation/technical/api-trace2.txt ##
    -@@ Documentation/technical/api-trace2.txt: The "exec_id" field is a command-unique id and is only useful if the
    - {
    - 	"event":"def_param",
    - 	...
    -+	scope: <a string that 'git config --show-scope' would return>
    - 	"param":"core.abbrev",
    - 	"value":"7"
    - }
     @@ Documentation/technical/api-trace2.txt: Print Configs::
      +
      The environment variable `GIT_TRACE2_CONFIG_PARAMS` and configuration